Who we Are

Meet Our Team

Edwin Haronian, M.D.

Board Certified Orthopedic Surgeon & Spine Surgery

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Jonathan F. Kohan, M.D.

Board Certified Anesthesiologist Pain Management

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Alan Massihi, DPM

Podiatry

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Heath Jason Hinze, Psy.D

Clinical Psychologist

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Jonathan T. Nassos, M.D.

Board Certified Orthopedic Surgeon & Sports Medicine

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Arash Yaghoobian M.D.

Board Certified Orthopedic & Spine Surgeon

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Alexander D. Ghasem M.D.

Board Certified Orthopedic Spine Surgeon

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Jonathan Berkowitz, M.D.

Board Certified Sports Orthopedic Surgeon

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Sherry Leoni, D.C.

Chiropractic

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Edwin Haronian, M.D.

Board Certified Orthopedic Surgeon & Spine Surgery

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Jonathan F. Kohan, M.D.

Board Certified Anesthesiologist Pain Management

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Alan Massihi, DPM

Podiatry

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Heath Jason Hinze, Psy.D

Clinical Psychologist

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Jonathan T. Nassos, M.D.

Board Certified Orthopedic Surgeon & Sports Medicine

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Arash Yaghoobian M.D.

Board Certified Orthopedic & Spine Surgeon

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Alexander D. Ghasem M.D.

Board Certified Orthopedic Spine Surgeon

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Jonathan Berkowitz, M.D.

Board Certified Sports Orthopedic Surgeon

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Sherry Leoni, D.C.

Chiropractic

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Edwin Haronian, M.D.

Board Certified Orthopedic Surgeon & Spine Surgery

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Jonathan F. Kohan, M.D.

Board Certified Anesthesiologist Pain Management

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Alan Massihi, DPM

Podiatry

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Heath Jason Hinze, Psy.D

Clinical Psychologist

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Ronald Glousman M.D.

Orthopedic Sports Surgery

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Levi Harrison, M.D.

Orthopedic Hand Surgery

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Edwin Ashley M.D.

Orthopedic Hand Surgery

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Berkay Unal, M.D.

Orthopedic Surgery / Joint Replacement

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Kamran Hakimian, M.D.

Physical Medicine & Rehabilitation

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Walter H. Burnham, M.D.

Spine Surgery

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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.

About Us

What We Do

Specialties

Spine Surgery

Cervical Degenerative Disorders Lumbar Degenerative Disc Disease Scoliosis Treatment

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Orthopedic Surgery

Knee Surgery Hip Surgery Shoulder Surgery Elbow Surgery

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Sports Medicine

Foot and Ankle Injuries Shoulder Injuries Knee Injuries Muscle Cramps

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Pain Management

Acute Pain Chronic Pain Electromyography MRI

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Explore All Specialties

Patient Testimonials

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

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