Our Physicians

With our roster of Board-certified and Fellowship trained physicians, the Tri-Valley Orthopedic Specialist group offers a wide range of treatments for musculoskeletal problems. Through its “Centers of Excellence” approach and the availability of in-house “Open MRI” for extremity imaging, patients can be assured that they will be evaluated and treated by a physician who is a practice leader in treating their particular problem.

Hand and Upper Extremity

  • Alexandra M. Burgar, M.D.

    Alexandra M. Burgar, M.D.

    Dr. Burgar treats conditions affecting the bones, muscles, nerves and tendons of the hand, wrist and arm up to and including the elbow.

  • Gregory Horner, M.D.

    Gregory Horner, M.D.

    As the leader of Tri-Valley Orthopedic Specialists’ hand surgery team, Dr. Horner treats conditions affecting the bones, muscles, nerves and tendons of the hand, wrist and arm up to and including the shoulder.

Sports Medicine & Arthroscopy

  • Kambiz Behzadi, M.D.

    Kambiz Behzadi, M.D.

    Dr. Behzadi is a board certified orthopedic surgeon in the bay area specializing in the management and surgical treatment of knee, shoulder and hip.

  • Roger D. Dainer, D.O.

    Roger D. Dainer, D.O.

    Dr. Dainer joined the Tri-Valley Orthopedic group in 1990, after 10 years of U.S. Naval Service. As a Board-certified Orthopedic Surgeon, he treats patients with a wide range of musculoskeletal problems.

  • David J. Jupina, M.D.

    David J. Jupina, M.D.

    Dr. Jupina joined the Tri-Valley Orthopedic group in 1998. In addition to his busy orthopedic and sports medicine practice, he is currently team physician for our local Foothill High School athletes, and Orthopedic Surgery Consultant to the Federal Correctional Institution in Dublin, CA.

  • Ian A. Stine, M.D.

    Ian A. Stine, M.D.

    Dr. Stine is a fellowship-trained board certified orthopedic surgeon specializing in sports medicine, trauma, and joint reconstruction.

Foot and Ankle

  • Sean M. Dougherty, D.P.M.

    Sean M. Dougherty, D.P.M.

    Dr. Dougherty is a highly trained surgeon specializing in treating a wide range of foot and ankle conditions.

Joint Replacement

  • Kambiz Behzadi, M.D.

    Kambiz Behzadi, M.D.

    Dr. Behzadi is a board certified orthopedic surgeon in the bay area specializing in the management and surgical treatment of knee, shoulder and hip.

  • David J. Jupina, M.D.

    David J. Jupina, M.D.

    Dr. Jupina joined the Tri-Valley Orthopedic group in 1998. In addition to his busy orthopedic and sports medicine practice, he is currently team physician for our local Foothill High School athletes, and Orthopedic Surgery Consultant to the Federal Correctional Institution in Dublin, CA.

  • Ian A. Stine, M.D.

    Ian A. Stine, M.D.

    Dr. Stine is a fellowship-trained board certified orthopedic surgeon specializing in sports medicine, trauma, and joint reconstruction.

Pain Medicine

  • Steven S. Liu, M.D.

    Steven S. Liu, M.D.

    Starting Nov 6, 2017

    Dr. Liu is a an ACGME accredited fellowship trained and board certified pain medicine physician and is joining us from the Yale School of Medicine where he was assistant professor in the Department of Anesthesiology and associate director of pain medicine at the Yale Spine Center.

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