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Who we Are

Meet Our Team

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  • Picture of Edwin Haronian, M.D.

    Edwin Haronian, M.D.

    Board Certified Orthopedic Surgeon & Spine Surgery

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  • Picture of Jonathan F. Kohan, M.D.

    Jonathan F. Kohan, M.D.

    Board Certified Anesthesiologist Pain Management

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  • Picture of Alan Massihi, DPM

    Alan Massihi, DPM

    Podiatry

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  • Picture of Heath Jason Hinze, Psy.D

    Heath Jason Hinze, Psy.D

    Clinical Psychologist

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  • Picture of Jonathan T. Nassos, M.D.

    Jonathan T. Nassos, M.D.

    Board Certified Orthopedic Surgeon & Sports Medicine

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  • Picture of Arash Yaghoobian M.D.

    Arash Yaghoobian M.D.

    Board Certified Orthopedic & Spine Surgeon

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  • Picture of Alexander D. Ghasem M.D.

    Alexander D. Ghasem M.D.

    Board Certified Orthopedic Spine Surgeon

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  • Picture of Jonathan Berkowitz, M.D.

    Jonathan Berkowitz, M.D.

    Board Certified Sports Orthopedic Surgeon

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  • Picture of Sherry Leoni, D.C.

    Sherry Leoni, D.C.

    Chiropractic

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  • Picture of Edwin Haronian, M.D.

    Edwin Haronian, M.D.

    Board Certified Orthopedic Surgeon & Spine Surgery

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  • Picture of Jonathan F. Kohan, M.D.

    Jonathan F. Kohan, M.D.

    Board Certified Anesthesiologist Pain Management

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  • Picture of Alan Massihi, DPM

    Alan Massihi, DPM

    Podiatry

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  • Picture of Heath Jason Hinze, Psy.D

    Heath Jason Hinze, Psy.D

    Clinical Psychologist

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  • Picture of Jonathan T. Nassos, M.D.

    Jonathan T. Nassos, M.D.

    Board Certified Orthopedic Surgeon & Sports Medicine

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  • Picture of Arash Yaghoobian M.D.

    Arash Yaghoobian M.D.

    Board Certified Orthopedic & Spine Surgeon

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  • Picture of Alexander D. Ghasem M.D.

    Alexander D. Ghasem M.D.

    Board Certified Orthopedic Spine Surgeon

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  • Picture of Jonathan Berkowitz, M.D.

    Jonathan Berkowitz, M.D.

    Board Certified Sports Orthopedic Surgeon

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  • Picture of Sherry Leoni, D.C.

    Sherry Leoni, D.C.

    Chiropractic

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  • Picture of Edwin Haronian, M.D.

    Edwin Haronian, M.D.

    Board Certified Orthopedic Surgeon & Spine Surgery

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  • Picture of Jonathan F. Kohan, M.D.

    Jonathan F. Kohan, M.D.

    Board Certified Anesthesiologist Pain Management

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  • Picture of Alan Massihi, DPM

    Alan Massihi, DPM

    Podiatry

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  • Picture of Heath Jason Hinze, Psy.D

    Heath Jason Hinze, Psy.D

    Clinical Psychologist

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  • Picture of Ronald Glousman M.D.

    Ronald Glousman M.D.

    Orthopedic Sports Surgery

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  • Picture of Levi Harrison

    Levi Harrison, M.D.

    Orthopedic Hand Surgery

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  • Picture of Edwin Ashley

    Edwin Ashley M.D.

    Orthopedic Hand Surgery

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  • Picture of Berkay Unal, M.D.

    Berkay Unal, M.D.

    Orthopedic Surgery / Joint Replacement

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  • Picture of Kamran Hakimian, M.D.

    Kamran Hakimian, M.D.

    Physical Medicine & Rehabilitation

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  • Picture of Walter H. Burnham, M.D.

    Walter H. Burnham, M.D.

    Spine Surgery

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  • Picture of Nicole Record, DO

    Nicole Record, DO

    Spine Surgery

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About Us

Synapse Orthopedic Group

The highly-trained and experienced orthopedic surgeons offer specialized care for a wide range of bone and joint conditions.

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What our patients say

  • Today was my first appointment to see Dr. Nassos and I'm so glad I did! The office in Pomona was easy to find and the office staff was so helpful and professional. The Doctor was very courteous and to...
    Delilah S
  • Dr. Nassos is the BEST, couldn't have asked for a kinder, more attentive and professional doctor to take care of me. And gosh have I had my share of incompetent (read factory chain offices), rude with...
    Lily w
  • This office is always impeccably clean, the staff courteous and polite. The bathrooms are consistently tidy. My only recommendation for the ladies' room is to have a small table where we can place our...
    Kandis R
  • I went to Dr. Nassos for my shoulder. I found him prompt, nice, professional and a genuine, intelligent Dr.He suggested options alternative to surgery and eased my pain. Cannot recommend him enough.
    Jenna M
  • Dr. Nassos is Great!! I would highly recommend him. He is an expert at Orthopedic surgery, he has great bedside manner, he genuinely cares about his patients, he listens to you, and will go above and ...
    Christine G
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Advanced Technology

Arthroscopic Joint Surgery

Arthroscopy is a surgical procedure in which an arthroscope with combined camera is inserted into a joint. Arthroscopy term had been derived from two Greek words, arthro, meaning joint and skopein, meaning to examine.

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Get Back to the Game

Expert Care in Sports Injuries

Sports injuries occur while playing indoor or outdoor sports or during exercise. Sports injuries can occur due to accidents, inadequate training, improper use of protective devices, and insufficient stretching or warm-up exercises. The most common sports injuries are sprains, strains, fractures, and dislocations.

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Second Opinion

Surgical Consult

Obtaining second opinion regarding your upcoming surgery is probably a good decision. Our group of surgeons can make this process simple and can give you peace of mind that you are making the right decision.

The approach Minimally invasive alternatives Length of hospital Stay Placement of implants Alternatives to surgery Available non-operative treatment Ability of your surgeon Post operative plan

Contact Us

Locations & Directions

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