◈ Homepage — http://www.sfskin.com/This website is AudioEye enabled and is being optimized for accessibility. To open the AudioEye Toolbar, press "shift + =". Some assistive technologies may require the use of a passthrough function before this keystroke. For more information, activate the button labeled "Explore your accessibility options". APPOINTMENTS Skip to main content HOME ABOUT PRACTICE PROVIDERS SERVICES TESTIMONIALS CONTACT PATIENT PORTAL HOME ABOUT PRACTICE PROVIDERS SERVICES TESTIMONIALS CONTACT PATIENT PORTAL APPOINTMENTS San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA "So easy to have a televisit with Dr Dans! Easy intake and the portal worked really well." DIANA P. GOOGLE "Dr Dans was very patient and addressed all my concerns regarding men's hair thinning." SAHIL H. GOOGLE "Quick, efficient, personable, quality care." JOE J. GOOGLE Dr. Dans is very professional, thorough, and informative. Highly recommended! MARK D. GOOGLE "Dr. Dans is very professional, friendly and he spends time to explain the situation." KLAUS B. GOOGLE "Experienced staff cares for patients with charm and efficiency." JOSEPH B. GOOGLE Pause At San Francisco Dermatology in downtown San Francisco near Union Square, Michael J. Dans, MD, PhD, and his team offer the care patients need for healthier, and better appearing  skin. The providers develop effective treatment plans based on scientific evidence and their many years of experience, so patients can feel confident in the care they receive. The team cares for a wide range of skin conditions such as rosacea, psoriasis, skin cancer, acne, eczema, and warts, using the latest medical treatments to improve these conditions and relieve uncomfortable or unsightly symptoms. Dr. Dans and his team also provide surgical dermatology treatment to carefully remove moles, warts, skin cancer, and other growths. They take a conservative approach, leaving as much healthy skin in place as possible to minimize scarring. In addition to medical and surgical care, patients at San Francisco Dermatology can receive the latest aesthetic treatments, including injectables such as BotoxⓇ and Juvèderm. These cosmetic therapies help patients feel more confident in their appearance by erasing signs of aging and giving skin a more youthful appearance. With comprehensive services and a welcoming, relaxing environment, San Francisco Dermatology offers safe and effective care for healthy, beautiful skin. LOCATION 490 Post Street, Suite 320, San Francisco, California 94102 Phone (415) 781-1932 • Fax (415) 781-1947 We are conveniently located in the 490 Post Street medical building, which is on the corner of Post and Mason Street and is one block from Union Square in downtown San Francisco. The main entrance to the building is on Post Street between Mason and Powell. Parking Options: • Our building has valet parking. The entrance is on Mason Street, between Post and Sutter. The rate is about $15 per hour. •The Union Square garage is one block from our building. Enter on Post between Powell and Stockton. The rate is about $3 per hour. •We also recommend a lot one block west of our office, on Taylor between Post and Sutter. The rate is about $5 per hour. To enter this lot, take Post St., turn left on Taylor and make an immediate left turn into the lot in an alley called Cosmo Pl. There are also various other lots within a few blocks of our office, including the Sutter-Stockton garage, which is generally the least expensive. Public Transportation Options: The office is easily accessible by public transportation, such as BART (bart.gov), bus, cable car and light rail (sfmta.com). From BART, exit at Powell Street, walk up Powell toward Union Square, turn left on Post Street, and the entrance to the building will be on your right hand side toward the end of the block.     Dermatology Resources American Academy of Dermatology Public Resource Center DermNet Patient Information How to perform a self skin exam Melanoma Detection (The ABCD's)   PATIENT PORTAL         Our online patient portal allows both new and existing patients to email us, schedule or request appointments, fill out medical history forms, update personal information, check lab results and more. If you are a current patient and need to be seen urgently and cannot find an appointment soon enough on the portal, then please call us or click "request an appointment" in the portal. We will get back to you, usually within one business day. PATIENT PORTAL         WHAT WE OFFER Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   Major Insurances Accepted We do not accept all plans for these insurance companies, so please call your insurance company to verify if we are in network with your particular plan. Thank you! View full list of companies Choose Your Provider Michael Dans, MD, PhD Board Certified Dermatologist Mark Reisman, MD Board Certified Dermatologist "I highly recommended both these doctors and also the staff. Everyone is courteous , professional, and knowledgeable." HELEN G. "Dr. Dans is a very knowledgeable, and professional, yet personable doctor. I can ask many questions, and he answers them with care." EMIKO K. "I've been coming here for years and can't recommend highly enough the knowledge, skill, and excellent patient care that both Dr. Dans and Dr. Reisman have provided." MARTIN H. "Excellent, caring dermatological service, with an attentive clerical team. I have relied on the expertise of Dr. Dans for years, and recommend his practice." AL Z. "Got an appointment reasonably quickly, staff is efficient and pleasant, and Dr. Reisman took time and answered my questions." KAYE R. "I highly recommended both these doctors and also the staff. Everyone is courteous , professional, and knowledgeable." HELEN G. "Dr. Dans is a very knowledgeable, and professional, yet personable doctor. I can ask many questions, and he answers them with care." EMIKO K. 1 2 3 4 5 Pause © Copyright 2026 Tebra Inc. Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco, CA 94102 4.91/5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra ◈ Interior Pages — 28 pages crawledMichael J. Dans, MD, PhD: Board Certified Dermatologist Union Square San Francisco, CA APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Michael J. Dans, MD, PhD Board Certified Dermatologist located in Union Square, San Francisco, CA San Francisco Dermatology Providers Michael J. Dans, MD, PhD About Dr. Dans A board-certified dermatologist, Michael J. Dans, MD, PhD, provides comprehensive medical, surgical, and cosmetic dermatologic care at San Francisco Dermatology in downtown San Francisco near Union Square. He treats all skin conditions, from acne to infections to scarring. By offering personalized care, he helps each patient achieve better skin health and improved appearance. Dr. Dans received a bachelor’s degree in biochemistry at the University of California, Davis before earning his combined MD/PhD degree at New York University School of Medicine in New York City. He completed his dermatology residency at the Hospital of the University of Pennsylvania in Philadelphia. As an expert in his field, Dr. Dans has published numerous scientific and medical articles and book chapters about skin diseases and treatments. In addition to being on staff at California Pacific Medical Center, he teaches the next generation of physicians as a volunteer clinical instructor of dermatology at UCSF. In his free time, Dr. Dans enjoys skiing, hiking, and mountain biking with his family. Read more A board-certified dermatologist, Michael J. Dans, MD, PhD, provides comprehensive medical, surgical, and cosmetic dermatologic care at San Francisco Dermatology in downtown San Francisco near Union Square. He treats all skin conditions, from acne to infections to scarring. By offering personalized care, he helps each patient achieve better skin health and improved appearance. Dr. Dans received a bachelor’s degree in biochemistry at the University of California, Davis before earning his combined MD/PhD degree at New York University School of Medicine in New York City. He completed his dermatology residency at the Hospital of the University of Pennsylvania in Philadelphia. As an expert in his field, Dr. Dans has published numerous scientific and medical articles and book chapters about skin diseases and treatments. In addition to being on staff at California Pacific Medical Center, he teaches the next generation of physicians as a volunteer clinical instructor of dermatology at UCSF. In his free time, Dr. Dans enjoys skiing, hiking, and mountain biking with his family. Read less Major Insurances Accepted We do not accept all plans for these insurance companies, so please call your insurance company to verify if we are in network with your particular plan. Thank you! View full list of companies × Network Insurances AARP Aetna Anthem Blue Cross Blue Shield Brown & Toland Cigna GWH-Cigna (formerly Great West Healthcare) HealthNet Medicare Meridian Health Plan United Healthcare United Healthcare Oxford © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Accessibility Statement: Dermatologists Union Square San Francisco, CA: San Francisco Dermatology APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Accessibility Statement Location San Francisco Dermatology 490 Post St, Suite 320 Union Square San Francisco , CA 94102 Phone: 415-781-1932 Fax: 415-781-1947 Office Hours Monday 8:30 am - 5:00 pm 8:30 am to 5:00 pm Tuesday 8:30 am - 5:00 pm 8:30 am to 5:00 pm Wednesday 8:30 am - 5:00 pm 8:30 am to 5:00 pm Thursday 8:30 am - 5:00 pm 8:30 am to 5:00 pm Friday 8:30 am - 5:00 pm 8:30 am to 5:00 pm Saturday Closed Closed Sunday Closed Closed Get in touch 415-781-1932 © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Psoriasis - Union Square San Francisco, CA: San Francisco Dermatology: Dermatologist APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Psoriasis San Francisco Dermatology Our Services Psoriasis Tweet Share San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA Though it has no cure, the right treatment can help keep psoriasis, a chronic skin condition, under control. At San Francisco Dermatology in downtown San Francisco near Union Square, Michael J. Dans, MD, PhD and Mark Reisman, MD, provide comprehensive and personalized care for psoriasis. Book an appointment online through the patient portal or call the office to learn how he can help you manage psoriasis. 415-781-1932 Psoriasis Q & A What is psoriasis? Psoriasis is a dermatologic condition that causes your skin cells to build up more quickly than normal. This buildup can cause itchy, scaly, red patches of skin on different areas of your body. Other symptoms of psoriasis may include: Dry skin Cracked skin that bleeds Soreness or burning sensations in the skin Thick fingernails and toenails Swollen joints You may only experience psoriasis symptoms during flare-ups and then go months without any symptoms at all.  What causes psoriasis? Doctors don’t fully understand the cause of psoriasis. However, it is considered an autoimmune condition in which your immune system attacks healthy cells. You may develop psoriasis because of genetics or because of something within your environment. Experts believe that in people with psoriasis, skin cells behave as if they are trying to heal a wound or infection. This causes new skin cells to grow rapidly, in days instead of weeks, causing the buildup and scaliness. You may be at higher risk of psoriasis if you smoke, are obese, or have a family history of the condition. How is psoriasis treated? The team at San Francisco Dermatology offers comprehensive treatment for psoriasis. In most patients with mild to moderate psoriasis, Dr. Dans and Dr. Reisman prescribe lotions or ointments such as: Corticosteroids Synthetic vitamin D Retinoids Anthralin Salicylic acid Calcineurin inhibitors Moisturizers When used as directed, these lotions can help fight flare-ups, smooth away scaliness and dead skin cells, and reduce skin inflammation. If you have more severe psoriasis, you may also benefit from ultraviolet (UV) light therapy. During light therapy, you sit under UVA or UVB lights for a specified period of time. Regular, safe exposure to light therapy can improve your skin health and decrease flare-ups. You may also benefit from pills or injections that reduce immune system activity and decrease inflammation. However, these medicines can have serious side effects, so they’re only recommended for people with severe psoriasis. Dr. Dans and Dr. Reisman can help you find the right psoriasis treatment for you. Book an appointment online through the patient portal or call the office to find the help you need. Appointments What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Appointments - Union Square San Francisco, CA: San Francisco Dermatology APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Appointments San Francisco Dermatology Contents Home Appointments   Please read the following information before making your appointment.  When you are ready to make your appointment, click the “Book Appointment” link at the bottom of the page.   Both new and established patients can book appointments online by logging onto our patient portal.  If you are a new patient or do not yet have a patient portal account, you can sign up for a portal account by clicking clicking “Create an Account” on the screen that you will be directed to after you click the “Book Appointment” link below.  New patients should register on the portal, then send a message to our staff through the portal with an attached image of your health insurance card, along with your health insurance name, member ID and group ID. Once you are logged onto the patient portal, click “Appointments” or “Schedule Now.”  You can select follow-up or new patient appointments and which provider (Dr. Dans or Dr. Reisman) you would like to see.  If you need to make a laser or surgery appointment, please call us or send us an appointment request through the portal as these appointments cannot be booked online. Before your appointment, please confirm that your insurance is active and that we (San Francisco Dermatology, Dr. Michael Dans or Dr. Mark Reisman) are in NETWORK with your specific insurance plan (not just the insurance company providing your insurance).  We are in network with most PPO group insurance plans.  We are not in network with individual or Covered California PPO plans.  If you have an HMO plan, such as Brown and Toland, make sure you have an up-to-date referral from your primary care physician.  We are not in network with Hills Physicians or Kaiser.  As of July 1, 2026 we will no longer be accepting new patients with Blue Shield (we still accept Blue Cross). We do offer self-pay options.  Please be aware that even if we are in network with your insurance company and you have valid insurance, if you have an annual deductible, you will be responsible for charges until you meet your deductible.  You can call your insurance company if you are not familiar with the terms of your policy.   Please remember to bring your current insurance information and photo ID to your appointment. Please bring either Visa or Mastercard (or your HSA card) for payment of co-pays as we do not accept cash, checks or American Express.  You can also pay your co-pay online through the patient portal.  Patients with outstanding deductibles must provide us with a credit card to keep on file for payment of balances after your claim is processed by your insurance company. Your appointment time is the time you are scheduled to see the doctor, not the time you should arrive at the office, so please arrive at least 5 minutes early if you are a returning patient and at least 15 minutes early if you are a new patient for check-in procedures. There is valet parking in our building on Mason Street between Post and Sutter.  Less expensive self-parking is available in the Union Square or Sutter Stockton garages and various other garages in the area. If you are not able to make your scheduled appointment, please cancel at least 48 hours prior to your appointment or there will be a $75 cancellation fee.     Book Appointment What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Contact Us - San Francisco Dermatology: Dermatologists Union Square San Francisco, CA APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal San Francisco Dermatology Union Square, San Francisco, CA Office San Francisco Dermatology Contact Us Union Square San Francisco Driving Directions Opening hours Monday 8:30 am - 5:00 pm 8:30 am to 5:00 pm Tuesday 8:30 am - 5:00 pm 8:30 am to 5:00 pm Wednesday 8:30 am - 5:00 pm 8:30 am to 5:00 pm Thursday 8:30 am - 5:00 pm 8:30 am to 5:00 pm Friday 8:30 am - 5:00 pm 8:30 am to 5:00 pm Saturday Closed Closed Sunday Closed Closed Get in touch 415-781-1932 490 Post St Suite 320 San Francisco, CA 94102 fax: 415-781-1947 patient portal         Our online patient portal allows both new and existing patients to email us, schedule or request appointments, fill out medical history forms, update personal information, check lab results and more. If you are a current patient and need to be seen urgently and cannot find an appointment soon enough on the portal, then please call us or click "request an appointment" in the portal. We will get back to you, usually within one business day. Patient Portal         © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × San Francisco Dermatology: Dermatologists: Union Square San Francisco, CA APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal APPOINTMENTS San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA "So easy to have a televisit with Dr Dans! Easy intake and the portal worked really well." Diana P. Google "Dr Dans was very patient and addressed all my concerns regarding men's hair thinning." Sahil H. Google "Quick, efficient, personable, quality care." Joe J. Google Dr. Dans is very professional, thorough, and informative. Highly recommended! Mark D. Google "Dr. Dans is very professional, friendly and he spends time to explain the situation." Klaus B. Google "Experienced staff cares for patients with charm and efficiency." Joseph B. Google At San Francisco Dermatology in downtown San Francisco near Union Square, Michael J. Dans, MD, PhD, and his team offer the care patients need for healthier, and better appearing  skin. The providers develop effective treatment plans based on scientific evidence and their many years of experience, so patients can feel confident in the care they receive. The team cares for a wide range of skin conditions such as rosacea, psoriasis, skin cancer, acne, eczema, and warts, using the latest medical treatments to improve these conditions and relieve uncomfortable or unsightly symptoms. Dr. Dans and his team also provide surgical dermatology treatment to carefully remove moles, warts, skin cancer, and other growths. They take a conservative approach, leaving as much healthy skin in place as possible to minimize scarring. In addition to medical and surgical care, patients at San Francisco Dermatology can receive the latest aesthetic treatments, including injectables such as BotoxⓇ and Juvèderm. These cosmetic therapies help patients feel more confident in their appearance by erasing signs of aging and giving skin a more youthful appearance. With comprehensive services and a welcoming, relaxing environment, San Francisco Dermatology offers safe and effective care for healthy, beautiful skin. LOCATION 490 Post Street, Suite 320, San Francisco, California 94102 Phone (415) 781-1932 • Fax (415) 781-1947 We are conveniently located in the 490 Post Street medical building, which is on the corner of Post and Mason Street and is one block from Union Square in downtown San Francisco. The main entrance to the building is on Post Street between Mason and Powell. Parking Options: • Our building has valet parking. The entrance is on Mason Street, between Post and Sutter. The rate is about $15 per hour. •The Union Square garage is one block from our building. Enter on Post between Powell and Stockton. The rate is about $3 per hour. •We also recommend a lot one block west of our office, on Taylor between Post and Sutter. The rate is about $5 per hour. To enter this lot, take Post St., turn left on Taylor and make an immediate left turn into the lot in an alley called Cosmo Pl. There are also various other lots within a few blocks of our office, including the Sutter-Stockton garage, which is generally the least expensive. Public Transportation Options: The office is easily accessible by public transportation, such as BART (bart.gov), bus, cable car and light rail (sfmta.com). From BART, exit at Powell Street, walk up Powell toward Union Square, turn left on Post Street, and the entrance to the building will be on your right hand side toward the end of the block.     Dermatology Resources American Academy of Dermatology Public Resource Center DermNet Patient Information How to perform a self skin exam Melanoma Detection (The ABCD's)   patient portal         Our online patient portal allows both new and existing patients to email us, schedule or request appointments, fill out medical history forms, update personal information, check lab results and more. If you are a current patient and need to be seen urgently and cannot find an appointment soon enough on the portal, then please call us or click "request an appointment" in the portal. We will get back to you, usually within one business day. Patient Portal         What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   Major Insurances Accepted We do not accept all plans for these insurance companies, so please call your insurance company to verify if we are in network with your particular plan. Thank you! View full list of companies × Network Insurances AARP Aetna Anthem Blue Cross Blue Shield Brown & Toland Cigna GWH-Cigna (formerly Great West Healthcare) HealthNet Medicare Meridian Health Plan United Healthcare United Healthcare Oxford Choose Your Provider Michael Dans, MD, PhD Board Certified Dermatologist Mark Reisman, MD Board Certified Dermatologist Testimonials Words from our patients "Dr. Dans is a very knowledgeable, and professional, yet personable doctor. I can ask many questions, and he answers them with care." Emiko K. "I've been coming here for years and can't recommend highly enough the knowledge, skill, and excellent patient care that both Dr. Dans and Dr. Reisman have provided." Martin H. "Excellent, caring dermatological service, with an attentive clerical team. I have relied on the expertise of Dr. Dans for years, and recommend his practice." Al Z. "Got an appointment reasonably quickly, staff is efficient and pleasant, and Dr. Reisman took time and answered my questions." Kaye R. "I highly recommended both these doctors and also the staff. Everyone is courteous , professional, and knowledgeable." Helen G. San Francisco Dermatology 490 Post St Suite 320 San Francisco, CA 94102 © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Email Opt-out × SMS Opt-In × Appointment Confirmed Sorry, an error occurred. close × About - San Francisco Dermatology: Dermatologists Union Square San Francisco, CA APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal About San Francisco Dermatology San Francisco Dermatology About At San Francisco Dermatology in downtown San Francisco near Union Square, Michael J. Dans, MD, PhD, and his team offer the care patients need for healthier, and better appearing  skin. The providers develop effective treatment plans based on scientific evidence and their many years of experience, so patients can feel confident in the care they receive. The team cares for a wide range of skin conditions such as rosacea, psoriasis, skin cancer, acne, eczema, and warts, using the latest medical treatments to improve these conditions and relieve uncomfortable or unsightly symptoms. Dr. Dans and his team also provide surgical dermatology treatment to carefully remove moles, warts, skin cancer, and other growths. They take a conservative approach, leaving as much healthy skin in place as possible to minimize scarring. In addition to medical and surgical care, patients at San Francisco Dermatology can receive the latest aesthetic treatments, including injectables such as BotoxⓇ and Juvèderm. These cosmetic therapies help patients feel more confident in their appearance by erasing signs of aging and giving skin a more youthful appearance. With comprehensive services and a welcoming, relaxing environment, San Francisco Dermatology offers safe and effective care for healthy, beautiful skin. Testimonials Words from our patients "Dr. Dans is a very knowledgeable, and professional, yet personable doctor. I can ask many questions, and he answers them with care." Emiko K. "I've been coming here for years and can't recommend highly enough the knowledge, skill, and excellent patient care that both Dr. Dans and Dr. Reisman have provided." Martin H. "Excellent, caring dermatological service, with an attentive clerical team. I have relied on the expertise of Dr. Dans for years, and recommend his practice." Al Z. "Got an appointment reasonably quickly, staff is efficient and pleasant, and Dr. Reisman took time and answered my questions." Kaye R. "I highly recommended both these doctors and also the staff. Everyone is courteous , professional, and knowledgeable." Helen G. © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × San Francisco Dermatology: Dermatologists: Union Square San Francisco, CA APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal APPOINTMENTS San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA "So easy to have a televisit with Dr Dans! Easy intake and the portal worked really well." Diana P. Google "Dr Dans was very patient and addressed all my concerns regarding men's hair thinning." Sahil H. Google "Quick, efficient, personable, quality care." Joe J. Google Dr. Dans is very professional, thorough, and informative. Highly recommended! Mark D. Google "Dr. Dans is very professional, friendly and he spends time to explain the situation." Klaus B. Google "Experienced staff cares for patients with charm and efficiency." Joseph B. Google At San Francisco Dermatology in downtown San Francisco near Union Square, Michael J. Dans, MD, PhD, and his team offer the care patients need for healthier, and better appearing  skin. The providers develop effective treatment plans based on scientific evidence and their many years of experience, so patients can feel confident in the care they receive. The team cares for a wide range of skin conditions such as rosacea, psoriasis, skin cancer, acne, eczema, and warts, using the latest medical treatments to improve these conditions and relieve uncomfortable or unsightly symptoms. Dr. Dans and his team also provide surgical dermatology treatment to carefully remove moles, warts, skin cancer, and other growths. They take a conservative approach, leaving as much healthy skin in place as possible to minimize scarring. In addition to medical and surgical care, patients at San Francisco Dermatology can receive the latest aesthetic treatments, including injectables such as BotoxⓇ and Juvèderm. These cosmetic therapies help patients feel more confident in their appearance by erasing signs of aging and giving skin a more youthful appearance. With comprehensive services and a welcoming, relaxing environment, San Francisco Dermatology offers safe and effective care for healthy, beautiful skin. LOCATION 490 Post Street, Suite 320, San Francisco, California 94102 Phone (415) 781-1932 • Fax (415) 781-1947 We are conveniently located in the 490 Post Street medical building, which is on the corner of Post and Mason Street and is one block from Union Square in downtown San Francisco. The main entrance to the building is on Post Street between Mason and Powell. Parking Options: • Our building has valet parking. The entrance is on Mason Street, between Post and Sutter. The rate is about $15 per hour. •The Union Square garage is one block from our building. Enter on Post between Powell and Stockton. The rate is about $3 per hour. •We also recommend a lot one block west of our office, on Taylor between Post and Sutter. The rate is about $5 per hour. To enter this lot, take Post St., turn left on Taylor and make an immediate left turn into the lot in an alley called Cosmo Pl. There are also various other lots within a few blocks of our office, including the Sutter-Stockton garage, which is generally the least expensive. Public Transportation Options: The office is easily accessible by public transportation, such as BART (bart.gov), bus, cable car and light rail (sfmta.com). From BART, exit at Powell Street, walk up Powell toward Union Square, turn left on Post Street, and the entrance to the building will be on your right hand side toward the end of the block.     Dermatology Resources American Academy of Dermatology Public Resource Center DermNet Patient Information How to perform a self skin exam Melanoma Detection (The ABCD's)   patient portal         Our online patient portal allows both new and existing patients to email us, schedule or request appointments, fill out medical history forms, update personal information, check lab results and more. If you are a current patient and need to be seen urgently and cannot find an appointment soon enough on the portal, then please call us or click "request an appointment" in the portal. We will get back to you, usually within one business day. Patient Portal         What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   Major Insurances Accepted We do not accept all plans for these insurance companies, so please call your insurance company to verify if we are in network with your particular plan. Thank you! View full list of companies × Network Insurances AARP Aetna Anthem Blue Cross Blue Shield Brown & Toland Cigna GWH-Cigna (formerly Great West Healthcare) HealthNet Medicare Meridian Health Plan United Healthcare United Healthcare Oxford Choose Your Provider Michael Dans, MD, PhD Board Certified Dermatologist Mark Reisman, MD Board Certified Dermatologist Testimonials Words from our patients "Dr. Dans is a very knowledgeable, and professional, yet personable doctor. I can ask many questions, and he answers them with care." Emiko K. "I've been coming here for years and can't recommend highly enough the knowledge, skill, and excellent patient care that both Dr. Dans and Dr. Reisman have provided." Martin H. "Excellent, caring dermatological service, with an attentive clerical team. I have relied on the expertise of Dr. Dans for years, and recommend his practice." Al Z. "Got an appointment reasonably quickly, staff is efficient and pleasant, and Dr. Reisman took time and answered my questions." Kaye R. "I highly recommended both these doctors and also the staff. Everyone is courteous , professional, and knowledgeable." Helen G. San Francisco Dermatology 490 Post St Suite 320 San Francisco, CA 94102 © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Email Opt-out × SMS Opt-In × Appointment Confirmed Sorry, an error occurred. close × Testimonials & Reviews - Union Square San Francisco, CA: San Francisco Dermatology APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Testimonials & Reviews San Francisco Dermatology Testimonials & Reviews 4.91/5 San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA 4.91/5 Star Rating 902 total reviews San Francisco Dermatology always appreciates feedback from our valued patients. To date, we’re thrilled to have collected 902 reviews with an average rating of 4.91 out of 5 stars. Please read what others are saying about San Francisco Dermatology below, and as always, we would love to collect your feedback. HIll B. 5/5 Star Rating Submitted 05/09/26 Rockstar Roberta M. 4/5 Star Rating Submitted 05/01/26 He's was nice and polite Peter F. 5/5 Star Rating Submitted 04/22/26 As with all of my previous appointments, the service and treatment were top notch. Warm and efficient welome by the staff, merely a 3-minute wait to see Dr. Dans, and then another efficient, thorouh 6-month exam. I contine to be extremely pleased with my visits and treatment, and highly recommend Dr. Dans and his office. Michael R. 5/5 Star Rating Submitted 04/17/26 It was my first visit and next will be after 6 months Adriene R. 5/5 Star Rating Submitted 04/10/26 Excellent Forrest H. 5/5 Star Rating Submitted 03/27/26 Dr. Dans provides attentive and empathetic care, and really listens. Irene G. 5/5 Star Rating Submitted 03/25/26 I had an excellent experience. I recommend Dr Dans for any Dermatological problem. Irene Gordon Janet S. 5/5 Star Rating Submitted 03/24/26 Good experience Vladimir M. 5/5 Star Rating Submitted 03/17/26 Dear, Dr. M.Dans There are no bad DOCTORS. There are only sick patients. And they are capricious always, by definition. Best Regards for you Sidra K. 5/5 Star Rating Submitted 03/16/26 Dr. Dans is a brilliant dermatologist who I've been seeing for more than a decade. I highly recommend him. He has diagnosed and effectively treated some of my critical skin issues which were neglected by other specialists. Leveraging his expertise for my skin concerns has always been worth it. Thank you! Richard K. 5/5 Star Rating Submitted 03/11/26 Dr. Dans is extremely professional and qualified in Dermatology. Having been a patient of many dermatologists since 1977, I feel he is the best. Serene D. 5/5 Star Rating Submitted 03/09/26 This was my initial visit. Dr. Dans was professional & listened to my issues. Gregory R. 5/5 Star Rating Submitted 03/06/26 Friendly team and great treatment. Rodney W. 5/5 Star Rating Submitted 03/06/26 See you next month Aleksandra M. 5/5 Star Rating Submitted 03/05/26 Great Doctor! Omar K. 5/5 Star Rating Submitted 03/03/26 Quick, efficient, pleasant. Jeffrey L. 5/5 Star Rating Submitted 02/24/26 Dr. Dans does the following very well; What he is observing with your skin. What if anything has changed. How and why he wants to move forward with your treatment. Overall follow up from everyone one on the team. John H. 5/5 Star Rating Submitted 02/24/26 It went very well, as usual. Joseph P. 5/5 Star Rating Submitted 02/18/26 Convenient, very professional and pleasant. Karen G. 5/5 Star Rating Submitted 02/11/26 Very professional, and caring staff. Easy to book an appointment, and great followup. Highly recommend. ‹ 1 2 3 4 5 6 7 8 ... 45 46 › © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × San Francisco Dermatology: Dermatologists: Union Square San Francisco, CA APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal APPOINTMENTS San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA "So easy to have a televisit with Dr Dans! Easy intake and the portal worked really well." Diana P. Google "Dr Dans was very patient and addressed all my concerns regarding men's hair thinning." Sahil H. Google "Quick, efficient, personable, quality care." Joe J. Google Dr. Dans is very professional, thorough, and informative. Highly recommended! Mark D. Google "Dr. Dans is very professional, friendly and he spends time to explain the situation." Klaus B. Google "Experienced staff cares for patients with charm and efficiency." Joseph B. Google At San Francisco Dermatology in downtown San Francisco near Union Square, Michael J. Dans, MD, PhD, and his team offer the care patients need for healthier, and better appearing  skin. The providers develop effective treatment plans based on scientific evidence and their many years of experience, so patients can feel confident in the care they receive. The team cares for a wide range of skin conditions such as rosacea, psoriasis, skin cancer, acne, eczema, and warts, using the latest medical treatments to improve these conditions and relieve uncomfortable or unsightly symptoms. Dr. Dans and his team also provide surgical dermatology treatment to carefully remove moles, warts, skin cancer, and other growths. They take a conservative approach, leaving as much healthy skin in place as possible to minimize scarring. In addition to medical and surgical care, patients at San Francisco Dermatology can receive the latest aesthetic treatments, including injectables such as BotoxⓇ and Juvèderm. These cosmetic therapies help patients feel more confident in their appearance by erasing signs of aging and giving skin a more youthful appearance. With comprehensive services and a welcoming, relaxing environment, San Francisco Dermatology offers safe and effective care for healthy, beautiful skin. LOCATION 490 Post Street, Suite 320, San Francisco, California 94102 Phone (415) 781-1932 • Fax (415) 781-1947 We are conveniently located in the 490 Post Street medical building, which is on the corner of Post and Mason Street and is one block from Union Square in downtown San Francisco. The main entrance to the building is on Post Street between Mason and Powell. Parking Options: • Our building has valet parking. The entrance is on Mason Street, between Post and Sutter. The rate is about $15 per hour. •The Union Square garage is one block from our building. Enter on Post between Powell and Stockton. The rate is about $3 per hour. •We also recommend a lot one block west of our office, on Taylor between Post and Sutter. The rate is about $5 per hour. To enter this lot, take Post St., turn left on Taylor and make an immediate left turn into the lot in an alley called Cosmo Pl. There are also various other lots within a few blocks of our office, including the Sutter-Stockton garage, which is generally the least expensive. Public Transportation Options: The office is easily accessible by public transportation, such as BART (bart.gov), bus, cable car and light rail (sfmta.com). From BART, exit at Powell Street, walk up Powell toward Union Square, turn left on Post Street, and the entrance to the building will be on your right hand side toward the end of the block.     Dermatology Resources American Academy of Dermatology Public Resource Center DermNet Patient Information How to perform a self skin exam Melanoma Detection (The ABCD's)   patient portal         Our online patient portal allows both new and existing patients to email us, schedule or request appointments, fill out medical history forms, update personal information, check lab results and more. If you are a current patient and need to be seen urgently and cannot find an appointment soon enough on the portal, then please call us or click "request an appointment" in the portal. We will get back to you, usually within one business day. Patient Portal         What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   Major Insurances Accepted We do not accept all plans for these insurance companies, so please call your insurance company to verify if we are in network with your particular plan. Thank you! View full list of companies × Network Insurances AARP Aetna Anthem Blue Cross Blue Shield Brown & Toland Cigna GWH-Cigna (formerly Great West Healthcare) HealthNet Medicare Meridian Health Plan United Healthcare United Healthcare Oxford Choose Your Provider Michael Dans, MD, PhD Board Certified Dermatologist Mark Reisman, MD Board Certified Dermatologist Testimonials Words from our patients "Dr. Dans is a very knowledgeable, and professional, yet personable doctor. I can ask many questions, and he answers them with care." Emiko K. "I've been coming here for years and can't recommend highly enough the knowledge, skill, and excellent patient care that both Dr. Dans and Dr. Reisman have provided." Martin H. "Excellent, caring dermatological service, with an attentive clerical team. I have relied on the expertise of Dr. Dans for years, and recommend his practice." Al Z. "Got an appointment reasonably quickly, staff is efficient and pleasant, and Dr. Reisman took time and answered my questions." Kaye R. "I highly recommended both these doctors and also the staff. Everyone is courteous , professional, and knowledgeable." Helen G. San Francisco Dermatology 490 Post St Suite 320 San Francisco, CA 94102 © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Email Opt-out × SMS Opt-In × Appointment Confirmed Sorry, an error occurred. close × Terms & Conditions: Dermatologists Union Square San Francisco, CA: San Francisco Dermatology APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Terms & Conditions San Francisco Dermatology (“we,” “us,” or “our”) provides this website (“Site”) to you conditioned on your acceptance without modification of the terms, conditions, and notices contained herein. Your use of this Site constitutes your agreement to all such terms, conditions, and notices. MODIFICATION OF THESE TERMS OF USE We reserve the right to change the terms, conditions, and notices under which this Site is offered, including but not limited to the charges associated with the use of this Site. LINKS TO THIRD PARTY SITES This Site may contain links to other websites ("Linked Sites"). The Linked Sites are not under our control and we are not responsible for the contents of any Linked Site, including without limitation any link contained in a Linked Site, or any changes or updates to a Linked Site. We are not responsible for webcasting or any other form of transmission received from any Linked Site. We are providing these links to you only as a convenience, and the inclusion of any link does not imply endorsement by us of the site or any association with its operators. 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By way of example, and not as a limitation, you agree that when using a Communication Service, you will not post content that contains: Personal and confidential information, including phone numbers, addresses, and health information; Vulgar content, including offensive, derogatory, obscene, profane, or inflammatory language or content; Threats or personal attacks on others; Discriminatory content or hate speech, including content that advocates against groups of people based on their race, ethnic origin, religion, disability, gender, gender identity, sexual orientation, age, or veteran status; Misrepresentations, including content submitted fraudulently on behalf of others or that misrepresents the your identity or connection with us or our practice; Non-applicable content, including posts that are not specific to us or our practice; Advertising or solicitations; Illegal content; or References to or information about ongoing legal matters or proceedings. 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All logos Services - Dermatologists Union Square San Francisco, CA: San Francisco Dermatology APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal About Services San Francisco Dermatology Our Services What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   Testimonials Words from our patients "Dr. Dans is a very knowledgeable, and professional, yet personable doctor. I can ask many questions, and he answers them with care." Emiko K. "I've been coming here for years and can't recommend highly enough the knowledge, skill, and excellent patient care that both Dr. Dans and Dr. Reisman have provided." Martin H. "Excellent, caring dermatological service, with an attentive clerical team. I have relied on the expertise of Dr. Dans for years, and recommend his practice." Al Z. "Got an appointment reasonably quickly, staff is efficient and pleasant, and Dr. Reisman took time and answered my questions." Kaye R. "I highly recommended both these doctors and also the staff. Everyone is courteous , professional, and knowledgeable." Helen G. © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Privacy Policy: Dermatologists Union Square San Francisco, CA: San Francisco Dermatology APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Privacy Policy PRIVACY STATEMENT We are committed to protecting your privacy and providing a safe online experience. This Privacy Statement applies to our Practice's website and governs our data collection and usage practices. By using this website, you consent to the data practices described in this Privacy Statement. Collection of your Personal Information This Practice collects personally identifiable information provided by you, such as your e-mail address, name, home or work address or telephone number. This Practice also collects anonymous demographic information, which is not unique to you, such as your ZIP code, age, gender, preferences, interests and favorites. There is also information about your computer hardware and software that is automatically collected by this website. This information can include: your IP address, browser type, domain names, access times and referring website addresses. This information is used for the operation of the service, to maintain quality of the service, and to provide general statistics regarding use of this website. Please keep in mind that if you directly disclose personally identifiable information or personally sensitive data through public message boards, this information may be collected and used by others. This Practice encourages you to review the privacy statements of websites you choose to link to from the website so that you can understand how those websites collect, use and share your information. This Practice is not responsible for the privacy statements or other content on any other websites. Use of your Personal Information This Practice collects and uses your personal information to operate the website and deliver the services you have requested. This Practice also uses your personally identifiable information to inform you of other products or services available from this Practice and its affiliates. This Practice may also contact you via surveys to conduct research about your opinion of current services or of potential new services that may be offered. This Practice does not sell, rent or lease its customer lists to third parties. This Practice may share data with trusted partners to help us perform statistical analysis, send you email or postal mail, provide customer support, or arrange for deliveries. All such third parties are prohibited from using your personal information except to provide these services and they are required to maintain the confidentiality of your information. This Practice does not use or disclose sensitive personal information, such as race, religion, or political affiliations, without your explicit consent. This Practice will disclose your personal information, without notice, only if required to do so by law. Use of Cookies The website uses "cookies" to help this Practice personalize your online experience. A cookie is a text file that is placed on your hard disk by a webpage server. Cookies cannot be used to run programs or deliver viruses to your computer. Cookies are uniquely assigned to you, and can only be read by a web server in the domain that issued the cookie to you. Security of your Personal Information This Practice secures your personal information from unauthorized access, use or disclosure. This Practice secures the personally identifiable information you provide on computer servers in a controlled, secure environment, protected from unauthorized access, use or disclosure. When personal information (such as a credit card number) is transmitted to other websites, it is protected through the use of encryption, such as the Secure Socket Layer (SSL) protocol. Changes to this Statement This Practice will occasionally update this Privacy Statement to reflect company and customer feedback. We encourage you to periodically review this Privacy Statement to be informed of how this Practice is protecting your information. Contact Information Please contact us by phone at 415-781-1932 or by mail at 490 Post St, Suite 320, San Francisco, CA 94102. Location San Francisco Dermatology 490 Post St, Suite 320 Union Square San Francisco , CA 94102 Phone: 415-781-1932 Fax: 415-781-1947 Office Hours Monday 8:30 am - 5:00 pm 8:30 am to 5:00 pm Tuesday 8:30 am - 5:00 pm 8:30 am to 5:00 pm Wednesday 8:30 am - 5:00 pm 8:30 am to 5:00 pm Thursday 8:30 am - 5:00 pm 8:30 am to 5:00 pm Friday 8:30 am - 5:00 pm 8:30 am to 5:00 pm Saturday Closed Closed Sunday Closed Closed Get in touch 415-781-1932 © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × San Francisco Dermatology: Dermatologists: Union Square San Francisco, CA APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal APPOINTMENTS San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA "So easy to have a televisit with Dr Dans! Easy intake and the portal worked really well." Diana P. Google "Dr Dans was very patient and addressed all my concerns regarding men's hair thinning." Sahil H. Google "Quick, efficient, personable, quality care." Joe J. Google Dr. Dans is very professional, thorough, and informative. Highly recommended! Mark D. Google "Dr. Dans is very professional, friendly and he spends time to explain the situation." Klaus B. Google "Experienced staff cares for patients with charm and efficiency." Joseph B. Google At San Francisco Dermatology in downtown San Francisco near Union Square, Michael J. Dans, MD, PhD, and his team offer the care patients need for healthier, and better appearing  skin. The providers develop effective treatment plans based on scientific evidence and their many years of experience, so patients can feel confident in the care they receive. The team cares for a wide range of skin conditions such as rosacea, psoriasis, skin cancer, acne, eczema, and warts, using the latest medical treatments to improve these conditions and relieve uncomfortable or unsightly symptoms. Dr. Dans and his team also provide surgical dermatology treatment to carefully remove moles, warts, skin cancer, and other growths. They take a conservative approach, leaving as much healthy skin in place as possible to minimize scarring. In addition to medical and surgical care, patients at San Francisco Dermatology can receive the latest aesthetic treatments, including injectables such as BotoxⓇ and Juvèderm. These cosmetic therapies help patients feel more confident in their appearance by erasing signs of aging and giving skin a more youthful appearance. With comprehensive services and a welcoming, relaxing environment, San Francisco Dermatology offers safe and effective care for healthy, beautiful skin. LOCATION 490 Post Street, Suite 320, San Francisco, California 94102 Phone (415) 781-1932 • Fax (415) 781-1947 We are conveniently located in the 490 Post Street medical building, which is on the corner of Post and Mason Street and is one block from Union Square in downtown San Francisco. The main entrance to the building is on Post Street between Mason and Powell. Parking Options: • Our building has valet parking. The entrance is on Mason Street, between Post and Sutter. The rate is about $15 per hour. •The Union Square garage is one block from our building. Enter on Post between Powell and Stockton. The rate is about $3 per hour. •We also recommend a lot one block west of our office, on Taylor between Post and Sutter. The rate is about $5 per hour. To enter this lot, take Post St., turn left on Taylor and make an immediate left turn into the lot in an alley called Cosmo Pl. There are also various other lots within a few blocks of our office, including the Sutter-Stockton garage, which is generally the least expensive. Public Transportation Options: The office is easily accessible by public transportation, such as BART (bart.gov), bus, cable car and light rail (sfmta.com). From BART, exit at Powell Street, walk up Powell toward Union Square, turn left on Post Street, and the entrance to the building will be on your right hand side toward the end of the block.     Dermatology Resources American Academy of Dermatology Public Resource Center DermNet Patient Information How to perform a self skin exam Melanoma Detection (The ABCD's)   patient portal         Our online patient portal allows both new and existing patients to email us, schedule or request appointments, fill out medical history forms, update personal information, check lab results and more. If you are a current patient and need to be seen urgently and cannot find an appointment soon enough on the portal, then please call us or click "request an appointment" in the portal. We will get back to you, usually within one business day. Patient Portal         What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   Major Insurances Accepted We do not accept all plans for these insurance companies, so please call your insurance company to verify if we are in network with your particular plan. Thank you! View full list of companies × Network Insurances AARP Aetna Anthem Blue Cross Blue Shield Brown & Toland Cigna GWH-Cigna (formerly Great West Healthcare) HealthNet Medicare Meridian Health Plan United Healthcare United Healthcare Oxford Choose Your Provider Michael Dans, MD, PhD Board Certified Dermatologist Mark Reisman, MD Board Certified Dermatologist Testimonials Words from our patients "Dr. Dans is a very knowledgeable, and professional, yet personable doctor. I can ask many questions, and he answers them with care." Emiko K. "I've been coming here for years and can't recommend highly enough the knowledge, skill, and excellent patient care that both Dr. Dans and Dr. Reisman have provided." Martin H. "Excellent, caring dermatological service, with an attentive clerical team. I have relied on the expertise of Dr. Dans for years, and recommend his practice." Al Z. "Got an appointment reasonably quickly, staff is efficient and pleasant, and Dr. Reisman took time and answered my questions." Kaye R. "I highly recommended both these doctors and also the staff. Everyone is courteous , professional, and knowledgeable." Helen G. San Francisco Dermatology 490 Post St Suite 320 San Francisco, CA 94102 © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Email Opt-out × SMS Opt-In × Appointment Confirmed Sorry, an error occurred. close × Eczema - Union Square San Francisco, CA: San Francisco Dermatology: Dermatologist APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Eczema San Francisco Dermatology Our Services Eczema Tweet Share San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA The itchy, scaly, and red breakouts caused by eczema can be embarrassing – and painful. At San Francisco Dermatology in downtown San Francisco near Union Square, board-certified dermatologists Michael J. Dans, MD, PhD and Mark Reisman, MD, can help you gain control over eczema and improve your skin’s health. Book an appointment online through the patient portal or call the office today to learn more. 415-781-1932 Eczema Q & A What is eczema? Eczema, also called atopic dermatitis, is a type of red and itchy skin rash. While it often appears in childhood, you can develop eczema at any age. Eczema is a lifelong condition that may flare up at different times of your life, and it does not have a cure. Eczema can appear on any part of the body, but may be more likely to appear on the hands, feet, wrists, ankles, neck, chest, or inside the bend of your knees and elbows. Symptoms of eczema include skin that is: Dry and itchy Reddened Scaly-looking Thickened Sensitive What causes eczema? The cause of eczema is unclear. Physicians believe it may be related to a gene that prevents your skin from protecting you from irritants.  Certain irritants can make eczema worse. These include: Certain chemicals Excessive sweating Dry air Allergens, like dust or pollen Scented skin products or detergents Knowing what triggers your eczema can help you avoid those things and reduce your number of flare-ups. How do dermatologists treat eczema? At San Francisco Dermatology, Dr. Dans and his team use a variety of treatments to help you prevent eczema flare-ups and improve your skin’s health. It’s important to follow your doctor’s instructions closely to keep eczema under control. Your personalized treatment plan may include multiple lotions and/or creams to use each day or when you have a flare-up. Some creams, such as moisturizers and corticosteroids, help keep skin from itching and becoming irritated. Other creams help repair your skin after a breakout. Antibiotic creams help prevent skin infections. For very severe breakouts, your doctor may prescribe oral steroids to stop the skin reaction. A new medicine, called dupilumab, may also help people with very severe eczema. At San Francisco Dermatology, Dr. Dans and Dr. Reisman provide personalized care for minor to severe eczema, improving the appearance and health of your skin. Book an appointment online through the patient portal or call the office to find out how he can help you. Appointments What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Dermatologic Surgery - Union Square San Francisco, CA: San Francisco Dermatology: Dermatologist APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Dermatologic Surgery San Francisco Dermatology Our Services Dermatologic Surgery Tweet Share San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA Dermatologists are trained to perform minor, in-office surgeries to remove skin growths, moles, cysts, skin cancer, and other lesions. At San Francisco Dermatology in downtown San Francisco near Union Square, Michael J. Dans, MD, PhD, provides comprehensive dermatologic surgery to improve your skin’s appearance and health. Book online through the patient portal or call the office today to learn about your surgery options. 415-781-1932 Dermatologic Surgery Q & A What is dermatologic surgery? Dermatologic surgery is any surgery performed on the skin. These surgery techniques can be used to improve your skin’s appearance or function.  All dermatologic surgeries are minimally invasive. They are quick procedures, usually performed in your dermatologist’s office, that use small tools, sometimes just needles, to perform biopsies or treatments.  Because dermatologic surgery is often used to improve appearance, your dermatologist uses every effort to minimize scarring and ensure as much healthy skin is saved as possible. What can dermatologic surgery treat? Dr. Dans and Dr. Reisman at San Francisco Dermatology use dermatologic surgery to address many different skin conditions, including, but not limited to: Moles Cysts (fluid-filled sacs) Skin cancer Lipomas (benign fatty tumors) Skin tags or skin growths Certain skin conditions, such as skin cancer, require surgery for proper treatment. A trained surgeon should always remove skin cancer to ensure all cancer cells are gone. Am I a candidate for dermatologic surgery? Because dermatologic surgeries are minimally invasive, taking place only in the skin, they typically don’t require general anesthesia (drugs that make you sleep through surgery). Your dermatologist can use regional or local anesthesia to numb the area while you’re awake. This greatly reduces any risks associated with surgery, making dermatologic surgery safe for people of all ages and with a wide range of health conditions. If you take blood thinners or have a bleeding disorder, tell your dermatologist before undergoing a surgical procedure.  Dermatologic surgery also has a quick recovery time and doesn’t require staying overnight in a hospital. While you may have to avoid certain strenuous activities after surgery, these safe and effective procedures can improve your health without taking a lot of your time. Appointments What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × San Francisco Dermatology: Dermatologists: Union Square San Francisco, CA APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal APPOINTMENTS San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA "So easy to have a televisit with Dr Dans! Easy intake and the portal worked really well." Diana P. Google "Dr Dans was very patient and addressed all my concerns regarding men's hair thinning." Sahil H. Google "Quick, efficient, personable, quality care." Joe J. Google Dr. Dans is very professional, thorough, and informative. Highly recommended! Mark D. Google "Dr. Dans is very professional, friendly and he spends time to explain the situation." Klaus B. Google "Experienced staff cares for patients with charm and efficiency." Joseph B. Google At San Francisco Dermatology in downtown San Francisco near Union Square, Michael J. Dans, MD, PhD, and his team offer the care patients need for healthier, and better appearing  skin. The providers develop effective treatment plans based on scientific evidence and their many years of experience, so patients can feel confident in the care they receive. The team cares for a wide range of skin conditions such as rosacea, psoriasis, skin cancer, acne, eczema, and warts, using the latest medical treatments to improve these conditions and relieve uncomfortable or unsightly symptoms. Dr. Dans and his team also provide surgical dermatology treatment to carefully remove moles, warts, skin cancer, and other growths. They take a conservative approach, leaving as much healthy skin in place as possible to minimize scarring. In addition to medical and surgical care, patients at San Francisco Dermatology can receive the latest aesthetic treatments, including injectables such as BotoxⓇ and Juvèderm. These cosmetic therapies help patients feel more confident in their appearance by erasing signs of aging and giving skin a more youthful appearance. With comprehensive services and a welcoming, relaxing environment, San Francisco Dermatology offers safe and effective care for healthy, beautiful skin. LOCATION 490 Post Street, Suite 320, San Francisco, California 94102 Phone (415) 781-1932 • Fax (415) 781-1947 We are conveniently located in the 490 Post Street medical building, which is on the corner of Post and Mason Street and is one block from Union Square in downtown San Francisco. The main entrance to the building is on Post Street between Mason and Powell. Parking Options: • Our building has valet parking. The entrance is on Mason Street, between Post and Sutter. The rate is about $15 per hour. •The Union Square garage is one block from our building. Enter on Post between Powell and Stockton. The rate is about $3 per hour. •We also recommend a lot one block west of our office, on Taylor between Post and Sutter. The rate is about $5 per hour. To enter this lot, take Post St., turn left on Taylor and make an immediate left turn into the lot in an alley called Cosmo Pl. There are also various other lots within a few blocks of our office, including the Sutter-Stockton garage, which is generally the least expensive. Public Transportation Options: The office is easily accessible by public transportation, such as BART (bart.gov), bus, cable car and light rail (sfmta.com). From BART, exit at Powell Street, walk up Powell toward Union Square, turn left on Post Street, and the entrance to the building will be on your right hand side toward the end of the block.     Dermatology Resources American Academy of Dermatology Public Resource Center DermNet Patient Information How to perform a self skin exam Melanoma Detection (The ABCD's)   patient portal         Our online patient portal allows both new and existing patients to email us, schedule or request appointments, fill out medical history forms, update personal information, check lab results and more. If you are a current patient and need to be seen urgently and cannot find an appointment soon enough on the portal, then please call us or click "request an appointment" in the portal. We will get back to you, usually within one business day. Patient Portal         What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   Major Insurances Accepted We do not accept all plans for these insurance companies, so please call your insurance company to verify if we are in network with your particular plan. Thank you! View full list of companies × Network Insurances AARP Aetna Anthem Blue Cross Blue Shield Brown & Toland Cigna GWH-Cigna (formerly Great West Healthcare) HealthNet Medicare Meridian Health Plan United Healthcare United Healthcare Oxford Choose Your Provider Michael Dans, MD, PhD Board Certified Dermatologist Mark Reisman, MD Board Certified Dermatologist Testimonials Words from our patients "Dr. Dans is a very knowledgeable, and professional, yet personable doctor. I can ask many questions, and he answers them with care." Emiko K. "I've been coming here for years and can't recommend highly enough the knowledge, skill, and excellent patient care that both Dr. Dans and Dr. Reisman have provided." Martin H. "Excellent, caring dermatological service, with an attentive clerical team. I have relied on the expertise of Dr. Dans for years, and recommend his practice." Al Z. "Got an appointment reasonably quickly, staff is efficient and pleasant, and Dr. Reisman took time and answered my questions." Kaye R. "I highly recommended both these doctors and also the staff. Everyone is courteous , professional, and knowledgeable." Helen G. San Francisco Dermatology 490 Post St Suite 320 San Francisco, CA 94102 © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Email Opt-out × SMS Opt-In × Appointment Confirmed Sorry, an error occurred. close × Skin Cancer - Union Square San Francisco, CA: San Francisco Dermatology: Dermatologist APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Skin Cancer San Francisco Dermatology Our Services Skin Cancer Tweet Share San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA Skin cancer becomes more common as you age, but can affect people of any age. Skin cancer is one of the most common and most treatable cancers, especially when caught early. At San Francisco Dermatology in downtown San Francisco near Union Square, Michael J. Dans, MD, PhD and Mark Reisman, MD, are dedicated to helping patients keep an eye on their skin cancer risk and providing outstanding skin cancer care. To schedule a consultation or a full-body skin check, book an appointment online through the patient portal or call the office. 415-781-1932 Skin Cancer Q & A What is skin cancer? If you have skin cancer, it means you have abnormal skin cells that are harmful (malignant). Skin cancer is most likely to develop in areas of your skin that have been repeatedly exposed to the sun’s damaging rays. However, skin cancer can develop on any area of skin. There are different types of skin cancer: Basal cell carcinoma, the most common type of skin cancer, can have various appearances from a flesh-colored bump, to a red spot, to a scab, to an open wound appearing lesion. Basal cell carcinomas rarely spread and can often be removed with an in-office procedure. Squamous cell carcinomas, the next most common type of skin cancer, can appear as firm red or white bumps or flat, scaly lesions. Though they’re slightly more likely to grow rapidly and spread than basal cell carcinomas, they can still usually be removed in your dermatologist’s office.  One of the most serious types of skin cancer is melanoma. Melanoma can appear as many different skin abnormalities.  It is usually very dark since it arrises from the melanocyte cells, which are the pigment (skin color) producing cells. It may also be pink, especially in people with very light skin.  As opposed to regular moles, it is usually larger (about pencil eraser size or more) and often has an irregular shape or color pattern. It is more likely to spread, affecting other areas of the body and requiring more treatment. How is skin cancer treated? The first line of treatment for almost all skin cancers is surgical removal of the abnormal cells. Dr. Dans at San Francisco Dermatology can remove small, local cancers in his comfortable office. However, larger cancers may require anesthesia and surgery at a hospital or surgery center. If your skin cancer has spread, you may also need chemotherapy. Chemotherapy uses drugs to kill cancer cells. You may also benefit from radiation therapy, which uses high energy beams to destroy abnormal cells. New melanoma treatments, such as immunotherapy, use your body’s own immune system to target and destroy cancer cells. These new treatments are giving many patients more treatment options than ever before. Am I at risk for skin cancer? You may be at higher risk for skin cancer if: You have fair or pale skin You live in a very sunny or high altitude climate You have a long history of sunburns You have many moles or a history of precancerous lesions You have a family or personal history of skin cancer To monitor your skin, San Francisco Dermatology recommends full-body skin checks at regular intervals such as every 1 to 2 years for patients without a history of skin cancer, or more frequently for patients who have had recent skin cancer. During these skin checks, Dr. Dans or Dr. Reisman takes note of any moles, lesions, or other areas of skin that may be cancerous or precancerous. Keeping track of any changes in these areas can help the team identify skin cancer early.  You can rely on Dr. Dans’s expertise and experience with skin cancer. Dr. Dans earned his PhD in the field of cancer research and stays up to date with the latest science-based evidence regarding skin cancer prevention and treatment. Know your risk for skin cancer. Book an appointment online through the patient portal or call the office today. Appointments What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Providers - San Francisco Dermatology: Dermatologists Union Square San Francisco, CA APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Meet Our Providers San Francisco Dermatology Providers Choose Your Provider Michael Dans, MD, PhD Board Certified Dermatologist Mark Reisman, MD Board Certified Dermatologist Testimonials Words from our patients "Dr. Dans is a very knowledgeable, and professional, yet personable doctor. I can ask many questions, and he answers them with care." Emiko K. "I've been coming here for years and can't recommend highly enough the knowledge, skill, and excellent patient care that both Dr. Dans and Dr. Reisman have provided." Martin H. "Excellent, caring dermatological service, with an attentive clerical team. I have relied on the expertise of Dr. Dans for years, and recommend his practice." Al Z. "Got an appointment reasonably quickly, staff is efficient and pleasant, and Dr. Reisman took time and answered my questions." Kaye R. "I highly recommended both these doctors and also the staff. Everyone is courteous , professional, and knowledgeable." Helen G. © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Laser Treatments - Union Square San Francisco, CA: San Francisco Dermatology: Dermatologist APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Laser Treatments San Francisco Dermatology Our Services Laser Treatments Tweet Share San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA Your skin has an amazing ability to heal itself that can be used to improve your appearance. At San Francisco Dermatology in downtown San Francisco near Union Square, Michael J. Dans, MD, PhD, uses laser treatments to prompt your skin’s natural healing abilities and correct imperfections. Book an appointment online through the patient portal or call the office to learn if laser treatment is right for you. 415-781-1932 Laser Treatments Q & A What is laser treatment? Laser treatment uses laser light energy to treat the skin. The laser energy passes through the skin without harming it and targets imperfections. At San Francisco Dermatology, Dr. Dans uses the VbeamⓇ Perfecta laser to offer great results from laser treatment. This pulsed dye laser uses concentrated yellow light to target reddened or discolored areas of skin while leaving healthy skin undamaged. The Vbeam Perfecta has a cooling system that protects the outer layer of the skin.  This laser is considered the gold standard for treating vascular (blood vessel) skin lesions. What skin imperfections is laser treatment used for? Dr. Dans uses laser treatment to improve the appearance of many skin imperfections. Laser treatment may help with: Scars Age spots or sun damage Pigmented areas of skin, such as birth marks Blood vessels, such as spider veins and other facial veins or capillaries Vascular lesions Rosacea After laser treatment, these imperfections will be less visible and skin will have a more even tone. You may need three or four laser treatments to experience the best results. Each treatment only takes 10-15 minutes, and you should begin to see results within just days.  Depending on what skin conditions you are treating, you may need maintenance appointments every 3-12 months. Dr. Dans helps you determine what treatment plan is right for you. Does laser treatment hurt? Vbeam Perfecta Laser treatments cause only mild discomfort and do not require pain medication. This laser delivers bursts of gentle light energy which can make your skin feel warm and tingly. It has a built-in cooling system that helps prevent any harm to your skin. Some patients say it feels like a rubber band snapping your skin as the laser passes over it. Side effects may include redness or mild swelling, but it clears quickly. Occasionally it may cause bruising lasting about one week. Pulsed dye lasers like the Vbeam Perfecta are so safe that they’ve been used to treat port wine stains on babies and small children.  Am I a candidate for laser treatment? While laser treatment is safe for most patients, it may not be as effective for people with severe acne or people with very dark skin. In these patients, the laser energy may not be able to target the pigmented treatment areas as well. At San Francisco Dermatology, you can receive the latest in laser treatments to achieve the beautiful skin you desire. Book an appointment online through the patient portal or call the office to learn if laser treatment can help you. Appointments What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Injectables - Union Square San Francisco, CA: San Francisco Dermatology: Dermatologist APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Injectables San Francisco Dermatology Our Services Injectables Tweet Share San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA Aging can wreak havoc on the skin, causing wrinkles and loss of collagen. At San Francisco Dermatology in downtown San Francisco near Union Square, Michael J. Dans, MD, PhD, offers comprehensive cosmetic services, including long-lasting injectable treatments, to fight signs of aging. Book an appointment online through the patient portal or call the office to learn more. 415-781-1932 Injectables Q & A What are injectables? “Injectables” is a term used to describe any cosmetic treatment that is injected into the skin with a needle. They’re most commonly used to reduce the appearance of wrinkles, give the face a fuller, younger-looking appearance, or get rid of varicose veins. Injectables are among the most popular cosmetic procedures in the United States. Some of the most common injectables include: BotoxⓇ or DysportⓇ (botulinum toxin) to reduce the appearance of fine lines and wrinkles Fillers, such as RestylaneⓇ and the JuvédermⓇ line of fillers including VolumaⓇ, which give the cheeks, lips, or nasolabial folds a fuller appearance Sclerotherapy to reduce the appearance of varicose veins Injectables are safe, effective treatments with no downtime. You can even receive some injectables over your lunch break and return to work without pain. How do injectables work? Injectables work in different ways to improve your appearance. Botox and Dysport Botox and Dysport use botulinum toxin to block nerve signals to the facial muscles that cause dynamic wrinkles that form from expressions. Without these nerve signals, the fine muscles in the face relax, smoothing out lines and wrinkles. Botox can be injected into the forehead, between the eyebrows, or at the edges of the eyes to reduce the appearance of wrinkles. Botox injections take only about 15 minutes to complete. You see results begin to show within a few days and should continue to see results for 3-4 months. You can schedule maintenance appointments to receive more injections to keep wrinkles away. Juvéderm and Restylane These dermal fillers use hyaluronic acid, which is a compound that’s found naturally in the skin, to create a fuller, plumper look. They can be used in the cheeks, lips, or around the mouth to add volume, smooth out wrinkles, and create a younger appearance. Filler injections take about 30 minutes to complete. They offer instant results that last for 6-12 months or even longer. Over time, the hyaluronic acid is harmlessly absorbed into your skin. You can schedule regular appointments to maintain your results. Sclerotherapy During sclerotherapy, a specialized solution is injected into the veins, causing them to collapse. The veins disappear permanently, usually within weeks.  Multiple treatments may be needed. You can typically return to your normal activities on the same day, although you need to wear compression stockings for at least two weeks. Am I a candidate for injectables? Injectables are safe for almost anyone who is looking to achieve a younger appearance, eliminate veins, or prevent wrinkles from forming. People as young as 30 commonly receive Botox injections. You may not be a candidate for injectables if you’re pregnant or have a bleeding disorder. Always tell your dermatologist about any medical conditions you have before receiving injectables. At San Francisco Dermatology, Dr. Dans offers personalized cosmetic treatments to help you improve your appearance and get the look you want. Book an appointment online through the patient portal or call the office to learn more about your options. Appointments What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Genital Lesions - Union Square San Francisco, CA: San Francisco Dermatology: Dermatologist APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Genital Lesions San Francisco Dermatology Our Services Genital Lesions Tweet Share San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA Human papillomavirus (HPV), the most common type of sexually transmitted disease, can cause genital warts in both men and women. At San Francisco Dermatology in downtown San Francisco near Union Square, Michael J. Dans, MD, PhD and Mark Reisman, MD, provide comprehensive treatment to manage genital lesions using medicines or surgical removal. Book an appointment online through the patient portal or call the office today to learn more. 415-781-1932 Genital Lesions Q & A What are genital lesions? Genital lesions, sometimes called genital warts, are abnormal growths in the genital area. Both men and women can develop genital lesions. They may be round or flat, smooth or rough. You may have just one or two small lesions or a large clump of lesions. Genital lesions may cause pain and itching. It’s important that you don’t try to remove the warts on your own using over-the-counter wart treatments because these medicines are not meant for use on the genitals. What causes genital lesions? Genital lesions are most often caused by sexually transmitted diseases, such as human papillomavirus (HPV). They may also be cancerous, though this is far more rare. To protect against genital lesions, you should always use barrier protection, such as condoms, during sex. If you have genital warts, you can spread them to any sexual partners. Pregnant women with active warts may also pass them on to their children at birth. Genital warts can also grow on the anus or in and around the mouth. You should always use protection when participating in anal or oral intercourse. How do dermatologists treat genital lesions? Dermatologists can diagnose and assess genital lesions. Your dermatologist may remove all or part of the lesion and send it to a lab to identify its cause. In some cases, harmless warts go away on their own and don’t require treatment. To remove the lesion, your dermatologist may use surgical tools to cut it away, cryoablation to freeze it away, or laser or electrocautery to burn the wart away. These simple, in-office procedures may be uncomfortable, but have little recovery or downtime.  Your dermatologist may also prescribe medicated lotions to treat warts and prevent breakouts. You should use these lotions as directed to keep your lesions under control. Remember, even if you don’t have an active breakout, you can still pass HPV to your sexual partner. At San Francisco Dermatology, Dr. Dans and Dr. Reisman offer comprehensive treatment for genital lesions. Book an appointment online through the patient portal or call the office today. Appointments What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Acne - Union Square San Francisco, CA: San Francisco Dermatology: Dermatologist APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Acne San Francisco Dermatology Our Services Acne Tweet Share San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA Acne affects millions of Americans each year, causing unsightly and even painful pimples and bumps on the face, chest, and back. Michael J. Dans, MD, PhD and Mark Reisman, MD at San Francisco Dermatology in downtown San Francisco near Union Square, use the latest medical treatments to help patients fight acne and enjoy more beautiful skin. Book an appointment online through the patient portal, or call the office today. 415-781-1932 Acne Q & A What is acne? Acne is a common skin condition that causes whiteheads, blackheads, and pimples to appear on your skin. These blemishes form when oil and skin cells block your pores, and they become inflamed and red.  Acne can appear as small bumps or large painful cysts. It’s often found on the face, chest, shoulders, and back. Breakouts can occur over and over again for years and even cause permanent skin scarring. With the right treatment from Dr. Dans at San Francisco Dermatology, you can reduce acne breakouts and enjoy clearer skin. What causes acne? As stated above, acne results when pores are blocked. You may be more likely to experience blocked pores if your skin produces a lot of oil or you’re experiencing certain hormonal changes. Excess amounts of hormones called androgens, such as testosterone, can contribute to acne breakouts. Teenagers are more likely to have high levels of these hormones, although some health conditions, such as polycystic ovary syndrome, can also cause high levels of androgens and lead to acne. Some medicines, such as corticosteroids, can also make acne worse.  Finally, your lifestyle may also increase your risk for breakouts. A diet heavy in refined carbohydrates may worsen acne. Stress may also contribute to acne. How do dermatologists treat acne? Your doctor will also likely prescribe a daily regimen of cleansers and/or lotions to clear away dead skin cells and oil. These cleansers help prevent blocked pores and breakouts. Common cleaners include: Benzoyl peroxide Salicylic acid In addition, regular peels and facial treatments may improve your skin’s health. If these conservative treatments aren’t enough, the doctors at San Francisco Dermatology may use prescription-strength solutions to fight acne. Certain antibiotics, in the form of lotions or pills, may also help keep skin clear by eliminating bacteria that cause inflammation and breakouts. If your acne is related to hormones, you may be able to take medicines such as spironolactone or birth control pills (if you are female) to reduce breakouts.  At San Francisco Dermatology, Dr. Dans offers comprehensive acne care. Take the first step toward clear skin by booking an appointment online through the patient portal or calling the office today. Appointments What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × San Francisco Dermatology Union Square, San Francisco, CA Office - Union Square San Francisco, CA: San Francisco Dermatology APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal San Francisco Dermatology Union Square, San Francisco, CA Office San Francisco Dermatology Contents Contact   Driving Directions OFFICE HOURS Monday 8:00 am - 5:00 pm Tuesday 8:00 am - 5:00 pm Wednesday 8:00 am - 5:00 pm Thursday 8:00 am - 5:00 pm Friday 8:00 am - 5:00 pm Saturday Closed Sunday Closed GET IN TOUCH 415-781-1932 490 Post St Suite 320 San Francisco, CA 94102 Fax: 415-781-1947 Appointments patient portal         Our online patient portal allows both new and existing patients to email us, schedule or request appointments, fill out medical history forms, update personal information, check lab results and more. If you are a current patient and need to be seen urgently and cannot find an appointment soon enough on the portal, then please call us or click "request an appointment" in the portal. We will get back to you, usually within one business day. Patient Portal         © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × San Francisco Dermatology: Dermatologists: Union Square San Francisco, CA APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal APPOINTMENTS San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA "So easy to have a televisit with Dr Dans! Easy intake and the portal worked really well." Diana P. Google "Dr Dans was very patient and addressed all my concerns regarding men's hair thinning." Sahil H. Google "Quick, efficient, personable, quality care." Joe J. Google Dr. Dans is very professional, thorough, and informative. Highly recommended! Mark D. Google "Dr. Dans is very professional, friendly and he spends time to explain the situation." Klaus B. Google "Experienced staff cares for patients with charm and efficiency." Joseph B. Google At San Francisco Dermatology in downtown San Francisco near Union Square, Michael J. Dans, MD, PhD, and his team offer the care patients need for healthier, and better appearing  skin. The providers develop effective treatment plans based on scientific evidence and their many years of experience, so patients can feel confident in the care they receive. The team cares for a wide range of skin conditions such as rosacea, psoriasis, skin cancer, acne, eczema, and warts, using the latest medical treatments to improve these conditions and relieve uncomfortable or unsightly symptoms. Dr. Dans and his team also provide surgical dermatology treatment to carefully remove moles, warts, skin cancer, and other growths. They take a conservative approach, leaving as much healthy skin in place as possible to minimize scarring. In addition to medical and surgical care, patients at San Francisco Dermatology can receive the latest aesthetic treatments, including injectables such as BotoxⓇ and Juvèderm. These cosmetic therapies help patients feel more confident in their appearance by erasing signs of aging and giving skin a more youthful appearance. With comprehensive services and a welcoming, relaxing environment, San Francisco Dermatology offers safe and effective care for healthy, beautiful skin. LOCATION 490 Post Street, Suite 320, San Francisco, California 94102 Phone (415) 781-1932 • Fax (415) 781-1947 We are conveniently located in the 490 Post Street medical building, which is on the corner of Post and Mason Street and is one block from Union Square in downtown San Francisco. The main entrance to the building is on Post Street between Mason and Powell. Parking Options: • Our building has valet parking. The entrance is on Mason Street, between Post and Sutter. The rate is about $15 per hour. •The Union Square garage is one block from our building. Enter on Post between Powell and Stockton. The rate is about $3 per hour. •We also recommend a lot one block west of our office, on Taylor between Post and Sutter. The rate is about $5 per hour. To enter this lot, take Post St., turn left on Taylor and make an immediate left turn into the lot in an alley called Cosmo Pl. There are also various other lots within a few blocks of our office, including the Sutter-Stockton garage, which is generally the least expensive. Public Transportation Options: The office is easily accessible by public transportation, such as BART (bart.gov), bus, cable car and light rail (sfmta.com). From BART, exit at Powell Street, walk up Powell toward Union Square, turn left on Post Street, and the entrance to the building will be on your right hand side toward the end of the block.     Dermatology Resources American Academy of Dermatology Public Resource Center DermNet Patient Information How to perform a self skin exam Melanoma Detection (The ABCD's)   patient portal         Our online patient portal allows both new and existing patients to email us, schedule or request appointments, fill out medical history forms, update personal information, check lab results and more. If you are a current patient and need to be seen urgently and cannot find an appointment soon enough on the portal, then please call us or click "request an appointment" in the portal. We will get back to you, usually within one business day. Patient Portal         What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   Major Insurances Accepted We do not accept all plans for these insurance companies, so please call your insurance company to verify if we are in network with your particular plan. Thank you! View full list of companies × Network Insurances AARP Aetna Anthem Blue Cross Blue Shield Brown & Toland Cigna GWH-Cigna (formerly Great West Healthcare) HealthNet Medicare Meridian Health Plan United Healthcare United Healthcare Oxford Choose Your Provider Michael Dans, MD, PhD Board Certified Dermatologist Mark Reisman, MD Board Certified Dermatologist Testimonials Words from our patients "Dr. Dans is a very knowledgeable, and professional, yet personable doctor. I can ask many questions, and he answers them with care." Emiko K. "I've been coming here for years and can't recommend highly enough the knowledge, skill, and excellent patient care that both Dr. Dans and Dr. Reisman have provided." Martin H. "Excellent, caring dermatological service, with an attentive clerical team. I have relied on the expertise of Dr. Dans for years, and recommend his practice." Al Z. "Got an appointment reasonably quickly, staff is efficient and pleasant, and Dr. Reisman took time and answered my questions." Kaye R. "I highly recommended both these doctors and also the staff. Everyone is courteous , professional, and knowledgeable." Helen G. San Francisco Dermatology 490 Post St Suite 320 San Francisco, CA 94102 © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Email Opt-out × SMS Opt-In × Appointment Confirmed Sorry, an error occurred. close × San Francisco Dermatology: Dermatologists: Union Square San Francisco, CA APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal APPOINTMENTS San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA "So easy to have a televisit with Dr Dans! Easy intake and the portal worked really well." Diana P. Google "Dr Dans was very patient and addressed all my concerns regarding men's hair thinning." Sahil H. Google "Quick, efficient, personable, quality care." Joe J. Google Dr. Dans is very professional, thorough, and informative. Highly recommended! Mark D. Google "Dr. Dans is very professional, friendly and he spends time to explain the situation." Klaus B. Google "Experienced staff cares for patients with charm and efficiency." Joseph B. Google At San Francisco Dermatology in downtown San Francisco near Union Square, Michael J. Dans, MD, PhD, and his team offer the care patients need for healthier, and better appearing  skin. The providers develop effective treatment plans based on scientific evidence and their many years of experience, so patients can feel confident in the care they receive. The team cares for a wide range of skin conditions such as rosacea, psoriasis, skin cancer, acne, eczema, and warts, using the latest medical treatments to improve these conditions and relieve uncomfortable or unsightly symptoms. Dr. Dans and his team also provide surgical dermatology treatment to carefully remove moles, warts, skin cancer, and other growths. They take a conservative approach, leaving as much healthy skin in place as possible to minimize scarring. In addition to medical and surgical care, patients at San Francisco Dermatology can receive the latest aesthetic treatments, including injectables such as BotoxⓇ and Juvèderm. These cosmetic therapies help patients feel more confident in their appearance by erasing signs of aging and giving skin a more youthful appearance. With comprehensive services and a welcoming, relaxing environment, San Francisco Dermatology offers safe and effective care for healthy, beautiful skin. LOCATION 490 Post Street, Suite 320, San Francisco, California 94102 Phone (415) 781-1932 • Fax (415) 781-1947 We are conveniently located in the 490 Post Street medical building, which is on the corner of Post and Mason Street and is one block from Union Square in downtown San Francisco. The main entrance to the building is on Post Street between Mason and Powell. Parking Options: • Our building has valet parking. The entrance is on Mason Street, between Post and Sutter. The rate is about $15 per hour. •The Union Square garage is one block from our building. Enter on Post between Powell and Stockton. The rate is about $3 per hour. •We also recommend a lot one block west of our office, on Taylor between Post and Sutter. The rate is about $5 per hour. To enter this lot, take Post St., turn left on Taylor and make an immediate left turn into the lot in an alley called Cosmo Pl. There are also various other lots within a few blocks of our office, including the Sutter-Stockton garage, which is generally the least expensive. Public Transportation Options: The office is easily accessible by public transportation, such as BART (bart.gov), bus, cable car and light rail (sfmta.com). From BART, exit at Powell Street, walk up Powell toward Union Square, turn left on Post Street, and the entrance to the building will be on your right hand side toward the end of the block.     Dermatology Resources American Academy of Dermatology Public Resource Center DermNet Patient Information How to perform a self skin exam Melanoma Detection (The ABCD's)   patient portal         Our online patient portal allows both new and existing patients to email us, schedule or request appointments, fill out medical history forms, update personal information, check lab results and more. If you are a current patient and need to be seen urgently and cannot find an appointment soon enough on the portal, then please call us or click "request an appointment" in the portal. We will get back to you, usually within one business day. Patient Portal         What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   Major Insurances Accepted We do not accept all plans for these insurance companies, so please call your insurance company to verify if we are in network with your particular plan. Thank you! View full list of companies × Network Insurances AARP Aetna Anthem Blue Cross Blue Shield Brown & Toland Cigna GWH-Cigna (formerly Great West Healthcare) HealthNet Medicare Meridian Health Plan United Healthcare United Healthcare Oxford Choose Your Provider Michael Dans, MD, PhD Board Certified Dermatologist Mark Reisman, MD Board Certified Dermatologist Testimonials Words from our patients "Dr. Dans is a very knowledgeable, and professional, yet personable doctor. I can ask many questions, and he answers them with care." Emiko K. "I've been coming here for years and can't recommend highly enough the knowledge, skill, and excellent patient care that both Dr. Dans and Dr. Reisman have provided." Martin H. "Excellent, caring dermatological service, with an attentive clerical team. I have relied on the expertise of Dr. Dans for years, and recommend his practice." Al Z. "Got an appointment reasonably quickly, staff is efficient and pleasant, and Dr. Reisman took time and answered my questions." Kaye R. "I highly recommended both these doctors and also the staff. Everyone is courteous , professional, and knowledgeable." Helen G. San Francisco Dermatology 490 Post St Suite 320 San Francisco, CA 94102 © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Email Opt-out × SMS Opt-In × Appointment Confirmed Sorry, an error occurred. close × Mark Reisman, MD: Board Certified Dermatologist Union Square San Francisco, CA APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Mark Reisman, MD Board Certified Dermatologist located in Union Square, San Francisco, CA San Francisco Dermatology Providers Mark Reisman, MD About Dr. Reisman Dr. Reisman has been working part time at San Francisco Dermatology since 2016, after retiring from Kaiser in Oakland. He is also a voluteer faculty at UCSF and teaches dermatology to UCSF medical students and residents. He has many years of experience in all aspects of general dermatology. Dr. Reisman is board certified by the American Board of Dermatology.  In his free time, Dr. Reisman enjoys traveling with family and friends. Read more Dr. Reisman has been working part time at San Francisco Dermatology since 2016, after retiring from Kaiser in Oakland. He is also a voluteer faculty at UCSF and teaches dermatology to UCSF medical students and residents. He has many years of experience in all aspects of general dermatology. Dr. Reisman is board certified by the American Board of Dermatology.  In his free time, Dr. Reisman enjoys traveling with family and friends. Read less Major Insurances Accepted We do not accept all plans for these insurance companies, so please call your insurance company to verify if we are in network with your particular plan. Thank you! View full list of companies × Network Insurances AARP Aetna Anthem Blue Cross Blue Shield Brown & Toland Cigna GWH-Cigna (formerly Great West Healthcare) HealthNet Medicare Meridian Health Plan United Healthcare United Healthcare Oxford © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × San Francisco Dermatology: Dermatologists: Union Square San Francisco, CA APPOINTMENTS More Skip to main content Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal Home About Practice Providers Services Skin Cancer Dermatologic Surgery Injectables Laser Treatments Acne Eczema Psoriasis Genital Lesions Testimonials Contact Patient Portal APPOINTMENTS San Francisco Dermatology Dermatologists located in Union Square, San Francisco, CA "So easy to have a televisit with Dr Dans! Easy intake and the portal worked really well." Diana P. Google "Dr Dans was very patient and addressed all my concerns regarding men's hair thinning." Sahil H. Google "Quick, efficient, personable, quality care." Joe J. Google Dr. Dans is very professional, thorough, and informative. Highly recommended! Mark D. Google "Dr. Dans is very professional, friendly and he spends time to explain the situation." Klaus B. Google "Experienced staff cares for patients with charm and efficiency." Joseph B. Google At San Francisco Dermatology in downtown San Francisco near Union Square, Michael J. Dans, MD, PhD, and his team offer the care patients need for healthier, and better appearing  skin. The providers develop effective treatment plans based on scientific evidence and their many years of experience, so patients can feel confident in the care they receive. The team cares for a wide range of skin conditions such as rosacea, psoriasis, skin cancer, acne, eczema, and warts, using the latest medical treatments to improve these conditions and relieve uncomfortable or unsightly symptoms. Dr. Dans and his team also provide surgical dermatology treatment to carefully remove moles, warts, skin cancer, and other growths. They take a conservative approach, leaving as much healthy skin in place as possible to minimize scarring. In addition to medical and surgical care, patients at San Francisco Dermatology can receive the latest aesthetic treatments, including injectables such as BotoxⓇ and Juvèderm. These cosmetic therapies help patients feel more confident in their appearance by erasing signs of aging and giving skin a more youthful appearance. With comprehensive services and a welcoming, relaxing environment, San Francisco Dermatology offers safe and effective care for healthy, beautiful skin. LOCATION 490 Post Street, Suite 320, San Francisco, California 94102 Phone (415) 781-1932 • Fax (415) 781-1947 We are conveniently located in the 490 Post Street medical building, which is on the corner of Post and Mason Street and is one block from Union Square in downtown San Francisco. The main entrance to the building is on Post Street between Mason and Powell. Parking Options: • Our building has valet parking. The entrance is on Mason Street, between Post and Sutter. The rate is about $15 per hour. •The Union Square garage is one block from our building. Enter on Post between Powell and Stockton. The rate is about $3 per hour. •We also recommend a lot one block west of our office, on Taylor between Post and Sutter. The rate is about $5 per hour. To enter this lot, take Post St., turn left on Taylor and make an immediate left turn into the lot in an alley called Cosmo Pl. There are also various other lots within a few blocks of our office, including the Sutter-Stockton garage, which is generally the least expensive. Public Transportation Options: The office is easily accessible by public transportation, such as BART (bart.gov), bus, cable car and light rail (sfmta.com). From BART, exit at Powell Street, walk up Powell toward Union Square, turn left on Post Street, and the entrance to the building will be on your right hand side toward the end of the block.     Dermatology Resources American Academy of Dermatology Public Resource Center DermNet Patient Information How to perform a self skin exam Melanoma Detection (The ABCD's)   patient portal         Our online patient portal allows both new and existing patients to email us, schedule or request appointments, fill out medical history forms, update personal information, check lab results and more. If you are a current patient and need to be seen urgently and cannot find an appointment soon enough on the portal, then please call us or click "request an appointment" in the portal. We will get back to you, usually within one business day. Patient Portal         What we offer Services Skin Cancer more info Dermatologic Surgery more info Injectables more info Laser Treatments more info Acne more info Eczema more info Psoriasis more info Genital Lesions more info   Major Insurances Accepted We do not accept all plans for these insurance companies, so please call your insurance company to verify if we are in network with your particular plan. Thank you! View full list of companies × Network Insurances AARP Aetna Anthem Blue Cross Blue Shield Brown & Toland Cigna GWH-Cigna (formerly Great West Healthcare) HealthNet Medicare Meridian Health Plan United Healthcare United Healthcare Oxford Choose Your Provider Michael Dans, MD, PhD Board Certified Dermatologist Mark Reisman, MD Board Certified Dermatologist Testimonials Words from our patients "Dr. Dans is a very knowledgeable, and professional, yet personable doctor. I can ask many questions, and he answers them with care." Emiko K. "I've been coming here for years and can't recommend highly enough the knowledge, skill, and excellent patient care that both Dr. Dans and Dr. Reisman have provided." Martin H. "Excellent, caring dermatological service, with an attentive clerical team. I have relied on the expertise of Dr. Dans for years, and recommend his practice." Al Z. "Got an appointment reasonably quickly, staff is efficient and pleasant, and Dr. Reisman took time and answered my questions." Kaye R. "I highly recommended both these doctors and also the staff. Everyone is courteous , professional, and knowledgeable." Helen G. San Francisco Dermatology 490 Post St Suite 320 San Francisco, CA 94102 © Copyright 2026 Tebra Inc . Privacy Policy Terms & Conditions Accessibility Notice Contact Us San Francisco Dermatology, San Francisco, CA Phone (appointments): 415-781-1932 | Phone (general inquiries): 415-781-1932 Address: 490 Post St, Suite 320, San Francisco , CA 94102 4.91 / 5 4.91/5 Star Rating (902 reviews) Medical website powered by Tebra × Email Opt-out × SMS Opt-In × Appointment Confirmed Sorry, an error occurred. close ×