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Full Range of Professional Orthopedic Services

Board Certified Orthopedic Surgeons

One-stop treatment facility

    Welcome to California Orthopedic & Microsurgery Institute also known as (COMSI). We treat a full range of bone, joint, muscle, and nerve problems, giving only the best treatment and care. At COMSI, patients will discover a comprehensive, one-stop treatment facility for all ailments, covering the fullest range of injuries. Specializing in hand and micro surgery, shoulder and elbow surgery, foot and ankle surgery, knee and hip surgery, pelvic surgery, spine surgery, Fracture Care, and trauma care.

Medical Insurance accepted

PPO's, Medicare, HMO plans, Worker;s Compensation, Personal Injuries, and self pay.

For more information, please contact us at:

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Virtual Care

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       Gary Y. Chen, M.D. is the founder & director of COMSI (California Orthopedic and Microsurgery Institute). He specializes in Fracture/Trauma Hand & Micro Surgery, Peripheral Nerve Surgery, Shoulder and Elbow Surgery. Dr. Gary Chen is one of the prominent doctors in Los Angeles, he received his medical degree from Sun Yat-Sen University of Medical Science in Guangzhou, China, and completed his Orthopedic surgery residency, Plastic and Hand micro-surgery specialty training in China. Dr. Chen served his surgical internship at Brown University, Orthopedic residency at Los Angeles County Hospital, Orthopedic trauma fellowship at the University of Louisville, Hand microsurgery fellowship at both Kleinert Hand Center and Curtis National Hand Center, and was a microsurgery instructor at Curtis National Hand Center (Johns Hopkins). Dr. Chen is currently an Associate Clinical Professor of Orthopedic Surgery at UCLA, the Chief of the Orthopedic Surgery Program at California Medical Center.

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One Stop Shop for Orthopedic Services:



Work Related 


Injury Care


Sports Medicine


Request an appointment today!

Our providers are here to guide you to a pain free life.


     My name is Kevin Flood and Dr. Chen in L.A. is one to be held up for others to see. MY arm has been broken 5 or 6 times in my life. The last time was the worst. 
     Dr. Chen actually fixed and reconstructed my arm and wrist after this other doctor screwed it all up. I was in seriously bad pain and I could not turn the palm of my hand in an upright position. 
     I was told by a doctor that I trust that Doctor Chen is the best orthopedic doctor. He is Right! Three years now and no pain and my arm and wrist work perfectly. I do a lot of hard labor work and I can still throw a fastball! Thank you, Dr. Chen and your cool staff!"

-Kevin Flood, former patient

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