◈ Homepage — https://www.gmspt.com/Looking for the Best Physical Therapy in Diamond Bar, We Are Accepting New Patients 21015 Pathfinder Rd #100 Diamond Bar, CA 91765 (909) 861-3511 Request My Appointment Now Home About Us What We Treat How We Treat Patient Center Contact Us Get Back to Living Pain-Free with Hands-On Care Personalized physical therapy treatment designed to restore motion, strength, and confidence. Request My Appointment Now We Have Over 160 Five Star        Reviews Get Back to Living Pain-Free with Hands-On Care Personalized physical therapy treatment designed to restore motion, strength, and confidence. Request My Appointment Now We Have Over 160 Five Star 160+        Reviews Get Back to Living Pain-Free with Hands-On Care Personalized physical therapy treatment designed to restore motion, strength, and confidence. Request My Appointment Now We Have Over 160 Five Star 160+        Reviews Get Back to Living Pain-Free with Hands-On Care Personalized physical therapy treatment designed to restore motion, strength, and confidence. Request My Appointment Now We Have Over 160 Five Star        Reviews Serving the Community Since 1981 Most Insurance Plans Accepted Multi-Lingual Staff Welcome to Gary M. Souza Physical Therapy & Associates in Diamond Bar, CA Are You Having Trouble with Daily Activities? Looking for Someone to Listen? Looking for a Permanent Solution to the Pain? Looking for the Best Treatment? Looking to Have Fun with Family & Friends? Looking Avoid Unnecessary Medications & Surgery? Relieving Your Pain Could Be Easier Than You Think. You’ll Receive a Private, Thorough Initial Evaluation You’ll Feel Empowered with a Clear Plan for Recovery You’ll Receive Personalized Guidance & Pain Relief You’ll Improve Your Mobility, Strength, and Independence, You’ll Learn How to Prevent Future Problems & Stay Healthy Getting Started Is Easy STEP 1 Contact Our Office for Personal Guidance STEP 2 Schedule An Appointment STEP 3 Come In And Meet With Your Therapist Our Caring and Experienced Staff is Waiting for Your Call Call Now (909) 861-3511 Request My Appointment Now Convenient Hours Mon-Sat Right Off the 57 Freeway Did You Know That Not All Physical Therapy Is The Same? Most patients see results during their first visit with us. We are Simply the Best & Most Experienced in the Area Over 45 Years Rehabilitating Thousands Of Patients Board-Certified, Multi-Specialty, Licensed Therapists With Doctoral & Advanced Training 10,000 Square-Foot Clinic With Cutting-Edge Equipment You Will Work With The Same Therapist Every Visit Our Guarantee - You’ll Have An Exceptional Experience At Our Warm, Caring, Privately-Owned Practice Over 350 Physicians Actively Refer & Trust Our Care We Treat Most Areas Of The Body With The Latest Technology & Current Best Practices, Including: Joint Pain / Arthritis Pre/Post Surgical Patients Neck Pain / TMJ / Headaches Lower Back Pain / Sciatica Sprains / Strains / Tendinitis Sports Injuries Hand Injuries / trauma Balance Problems Vertigo / Dizziness Incontinence / Pelvic Floor Conditions Auto Accident Injuries Work Related Injuries Professional Services We Provide: Orthopedic Physical Therapy Sports Rehabilitation TMJ & Headache Specialists Fall Prevention Programs Sports Medicine Pelvic Floor Therapy Certified Hand Therapy Occupational Rehabilitation / Testing Success Stories Came to PT on doctor’s orders and I was hesitant at first as this was the first time in my life needing PT. I had to prep myself in the parking lot before stepping foot inside - that’s how worried I was about the unknown. Once I got inside and situated with Riley, all my worries went out the window. He was super calm, friendly, and professional. He laid the process out for me in simple layman’s terms and guided me through each potential step and the general timeline I should expect, while all the time making sure I had all my questions answered so that I was at ease. He gave me his honest opinion on my situation and likelihood of completing PT ahead of my doctor’s plan. I really appreciate how straight forward Riley was and every thing was quick to the point. Riley and the aides... FRANK B. Gary Souza Physical Therapy is the best! I’ve had physical therapy at some of the large physical therapy groups which don’t compare to Gary Souza. The therapists are professional, hands on, and so warm and supportive. They care and take time to ensure you get the best results. Don’t go anywhere else. LORRAINE T. I had two knee replacement surgeries and Gary and his team were there from beginning and I am almost at the end. Working with Sweeta has been a blessing. She and her assistants have me walking almost normally once again. She knows how to handle a recovering patient and proper therapy to apply. A little pain to recover is part of the process but cannot compare to the pain I had before the surgeries. I can't thank you enough for holding my hand through the process. Thank you CIRO U. Physical therapy at Gary Souza's PT office has changed my life. All the Therapist's here are experienced and highly trained professionals. Everyone is given a personalized program which is frequently changed to be in tune with the patient's progress. The therapists are acutely aware of the patient's needs and provide a safe environment to recover in. The equipment is Well-maintained and kept up-to-date. The Rooms and the whole facility are always clean and inviting. The overall atmosphere is one of welcome and well-bring. CATHLEEN M. Love, love, love this facility. I’m so glad that I was referred to this facility! All the therapists are very knowledgeable and caring. Explains treatments well and ask about my concerns. I am extremely grateful for all the support and treatments I received. My therapist evaluates me with every movement I take and comes up challenging and affective treatments that suite my needs. I already feel so much better after surviving stroke for 6 years. Especially considering I had been doing therapy at an out patient facility for 6 years and being discharged twice and still have to walk with a cane. I just love how the therapist explains everything and makes sure I do everything correctly. JULIE T. Gary M Souza PT is a first class operation. From the front office staff, to the physical therapists, to the pt aides, to the facilities - everything is first class. The front office expertly handles insurance reviews, appointment scheduling, and check-in is very efficient. All the staff are very nice and caring. The PTs do a wonderful job of balancing their patients, explaining things, and keeping track of progress. They spend whatever time is necessary to care for my needs. The facility is very clean. Each patient receives text reminders of appointments. I just can’t say enough good things and highly recommend this business for physical therapy needs. Thanks to you for helping me! DENISE C. Read More Reviews Add A Review We are In-Network With Most Insurance Plans No Referral, No Problem We Can See Patients Without a Physician’s Prescription If you don’t see your plan listed, please give us a call. We make every effort to verify your insurance benefits before your first visit with us. Our Caring and Experienced Staff is Waiting for Your Call Call Now (909) 861-3511 Request My Appointment Now Convenient Hours Mon-Sat Right Off the 57 Freeway The Recovery Process LEARN ABOUT THE 5 PHASES OF RECOVERY Click on a step to learn more. 1 2 3 4 5 Pain Relief Reducing pain, swelling, and inflammation are common goals in this phase of recovery. Injury protection, elevation, appropriate medications, compression, and patient education are important. Health News May 12, 2026 Tendinitis Myths Vs Truth: Learn The Facts To Expedite Your Recovery Tendon pain can develop almost anywhere in the body, from the shoulder and elbow to the knee and ankle. Read More May 5, 2026 Tendinitis Simplified: Common Signs, Types, And Pain-Free Recovery Tendinitis is one of the most common causes of musculoskeletal pain across the body and a frequently cited reason people cut back on exercise, work duties, or everyday activities. Read More April 28, 2026 The Real Long-Term Costs Of Various Treatments For Hip Pain Hip pain is a frequent reason people limit their movement, whether that means avoiding stairs, cutting back on exercise, or rethinking daily activities. Read More April 21, 2026 Considering Multivitamins To Boost Performance? Here’s What To Know If you train regularly or you are currently undergoing rehabilitation, you may have wondered whether a daily multivitamin could improve your energy, support recovery, or help you perform better. Read More April 14, 2026 Separating Hip Pain Myths And Facts To Achieve Faster Recovery Hip pain can often lead to mixed messages. Some advice encourages complete rest, while other sources suggest pushing through discomfort at all costs. Read More April 7, 2026 Hip Pain Explained: Causes, Warning Signs, And PT Benefits Hip discomfort can show up in many ways, from a dull ache in the groin to soreness along the outer hip or stiffness after sitting. Read More March 24, 2026 Comparing Physical Therapy Costs To Other Interventions For Knee Pain Knee pain is one of the most common reasons people cut back on activity, whether that means skipping workouts, avoiding stairs, or thinking twice before a long day on their feet. Read More March 17, 2026 Learn About Magnesium Supplementation For Performance And Recovery If you are trying to build strength, stay active, or recover from an injury, magnesium will probably show up on your radar at some point. In many cases, you will hear it mentioned as a potential sleep aid or supplement that can help with muscle cramps. Read More March 10, 2026 Clearing Up Facts About Knee Pain To Avoid Slow Recovery Knee pain causes frustration and confusion for many people because it does not always follow a predictable pattern. To make matters more difficult, much of the advice found online or shared casually among friends Read More March 3, 2026 Physical Therapy Is Almost Always The Best Treatment For Knee Pain Knee pain is one of the most common musculoskeletal complaints across all age groups, and it can quickly begin to interfere with walking, work tasks, exercise, and even sleep when it is not addressed early. Read More More Health News Back to Top 21015 Pathfinder Rd #100 Diamond Bar, CA 91765 (909) 861-3511 (909) 860-7900 [email protected] Get Directions Hours of Operation: Monday 7:00 AM — 7:00 PM Tuesday 7:00 AM — 6:00 PM Wednesday 7:00 AM — 7:00 PM Thursday 7:00 AM — 7:00 PM Friday 7:00 AM — 6:00 PM Saturday 8:00 AM — 12:00 PM Sunday Closed © Copyright 2026 Gary M. Souza Physical Therapy & Associates, All Rights Reserved. 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