Dr. Joseph Mejia

D.O., F.A.A.P.M.&R., R.M.S.K.

Pain Management Specialist in New Jersey

Dr. Mejia is board-certified and fellowship-trained in Physical Medicine and Rehabilitation, focusing on non-surgical orthopedic medicine. Additionally, he is fellowship-trained in interventional pain management. Dr. Mejia is triple board-certified in Physical Medicine and Rehabilitation, Interventional Pain Management and Sports Medicine. He also received extensive training in Regenerative Medicine.  He is also certified in diagnostic musculoskeletal ultrasound and has received extensive training in Regenerative Medicine for advanced spine conditions. Dr. Mejia is published in multiple projects and publications and ran 8 different courses and workshops.

Dr. Mejia Clinic Locations

Dr. Joseph Mejia, DO, FAAPM&R, RMSK is Performance Rehabilitation and Regenerative Medicine's Watchung Medical Director

Dr. Mejia completed his undergraduate degree at the University of Michigan, Ann Arbor, where he received a B.S. in Biology. He then earned his medical degree at the West Virginia School of Osteopathic Medicine. He is Board Certified by the American Board of Physical Medicine & Rehabilitation and fellowship-trained in Interventional Pain/Musculoskeletal Medicine. He holds medical licenses in both the state of New Jersey and New York.

Dr. Mejia is board certified in Physiatry, a medical specialty also known as Physical Medicine and Rehabilitation (PM&R). He is also fellowship-trained in interventional pain management. After completing his residency at NYU/Rusk Institute of Rehabilitation, he received fellowship training in Interventional Pain/Musculoskeletal Medicine at UMDNJ/Kessler Institute for Rehabilitation.



I graduated from therapy yesterday after 8 months of extraordinary treatment. When I started I could barely walk due to arthritis and a torn meniscus in my knee. Now I can walk a mile!! I will be forever grateful to the entire staff at the Watchung Performance Rehab center. I thought for sure that I would need a knee replacement. They have many different non surgical treatments. Over the course of my treatment, I had HA injections, stem cell and PRP injections, and lots of exercises designed specifically for me. This combination worked!!! I highly recommend this wonderful group and would use them again without hesitation.

Amanda V.

I went there with many problems relating to arthritis hoping for improvement to one knee. They were great sorting out each of my needs. My knees are much better after injections & stem with prp followed by pt. My back& neck are much better with chiropractic. You can’t heal the arthritis but I am much stronger. They have a large staff whom they treat very well. So, they are wonderful.
Ann H.


3150 US-22
Branchburg, NJ 08876


454 Elizabeth Ave #240
Somerset, NJ 08873


459 Watchung Ave
Watchung, NJ 07069

Surgical Center

1081 US 22 #201
Bridgewater, NJ 08807

Business Operations

1011 US-22 #203
Bridgewater, NJ 08873