School of Medicine


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  • Molly Timmerman

    Molly Timmerman

    Clinical Assistant Professor (Affiliated), Orthopaedic Surgery

    BioDr. Molly Timmerman is board-certified in Physical Medicine and Rehabilitation. She is Affiliated Clinical Assistant Professor of Physical Medicine and Rehabilitation/Orthopedic Surgery. She practices at Veterans Health Administration in Palo Alto, where she is Medical Director of Regional Amputation Center and the Polytrauma Network Site. She specializes in traumatic brain injury, post-traumatic headache management, and amputation medicine.

  • Michael David Tseng, MD

    Michael David Tseng, MD

    Clinical Assistant Professor, Orthopaedic Surgery

    BioMichael D. Tseng, MD is an orthopedic spine surgeon who specializes in spinal injuries and degenerative spine conditions. After over a decade in private practice, he was recruited to join the Stanford University School of Medicine faculty to serve as the Spine Section Chief at Stanford Health Care Tri-Valley.

    Dr. Tseng completed his undergraduate training at the University of Michigan, where he earned a degree in Biochemistry with Honors. He then went on to receive his MD at Weill Cornell University in New York, NY. He completed his internship and orthopedic surgery residency at renowned spine center William Beaumont Hospital in Royal Oak, Michigan. He then completed a spinal surgery fellowship at UCSF, where he worked with both orthopedic spine and neurosurgery faculty.

    Dr. Tseng has been an investigator in basic science, biomechanical and clinical research projects. He has presented at national and international spine conferences and published work in peer reviewed spine journals. He is a reviewer for the Spine Journal and the BMJ Best Practice-Spinal Stenosis section. He relishes contributing to the education of future surgeons as clinical faculty in the Stanford Orthopedic Surgery Residency and Stanford Orthopedic Spine Surgery Fellowship programs.

    As a fellowship-trained spine surgeon, Dr. Tseng treats a comprehensive range of injuries and conditions of the spine, including injuries to the neck and back.

    He believes in a conservative approach to treatment and always considers using nonoperative methods before recommending surgery. A holistic approach including education, core strengthening, limited medications, acupuncture or chiropractic care may address many common conditions including back pain.

    When surgery is necessary, he uses a caring bedside manner to form a collaborative treatment plan with his patients. He believes that well-informed patients have the best outcomes. His mission is to empower you with tools for functionality and wellness.

    He approaches surgery with a “minimalist” approach, doing the least surgery possible to achieve his patient’s objectives. When appropriate, he is skilled using the latest motion sparing surgical techniques such as microsurgical decompression, laminoplasty, and artificial disc replacement. He has completed advanced training in cervical disc replacements. He is experienced with minimally-invasive direct lateral spinal fusion and the Barricaid Annular Closure device for disc herniation surgery.

    Dr. Tseng is fortunate to work with Christopher Hydock, PA-C, an exceptional and experienced Physician Assistant.

    When Dr. Tseng is not seeing patients, he stays active through personal fitness, running, skiing and golf. He also enjoys cooking, music and spending time with family.