Project Description



Orthopedic Surgeon

Picture of Dr Michael Y Chang Doctor of Osteopathic Medicine



  • Walnut Creek


“My goal is to restore maximum function with the highest level of quality care so that my patients can get back to living life.”


Can I See Dr Contreras?

    2405 Shadelands Drive
    Walnut Creek CA 94598

  • Monday – Thursday
    8:00 AM – 5:00 PM

    8:00 AM – 4:00PM


With Dr Contreras


About Dr Contreras

Dr. Contreras began practicing orthopedic medicine in 1991 after receiving his medical degree and completing his internship and residency at University of California, San Francisco. His ensuing fellowship in orthopedic trauma prepared him for a challenging position as Assistant Clinical Professor for the Department of Orthopedic Surgery at UCSF’s School of Medicine, and lead to his appointment as the acting Chief of the Orthopaedic Department at San Francisco General Hospital.

Dr. Contreras is Board Certified in Orthopaedic Surgery and has more than 25 years of experience in treating patients.

Dr. Contreras applies his years of experience and knowledge daily to overcome orthopedic challenges. His thoroughness and contemplative nature ensure all avenues are explored when planning treatment, and his traditional values and personable demeanor offer patients comfort in addition to superior medicine.

An educator by nature, he has lectured and authored several articles on his specialty.

  • Board Certification

    • Orthopaedic Trauma

      San Francisco General Hospital, San Francisco, CA 1990

  • Fellowship

    • Orthopaedic Trauma

      San Francisco General Hospital, San Francisco, CA 1988

  • Residency

    • Orthopaedic Surgery

      University of California, San Francisco, 1987

  • Internship

    • Intern

      University of California, San Francisco, 1983

  • Medical School

    • MD

      University of California, San Francisco, 1982

  • College

    • BA

      University of California, Los Angeles, 1978


This is the list of the amazing things you’ve written including links out to those publications is desired

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Assisting the Doctor:

Golden State Ortho Doctor showing caring hands

Golden State Ortho Doctors are assisted by our clinical support teams which include Medical Assistants, X-Ray Technicians and more.

Reviews Mean So Much!

Reviews mean so much to both the doctor providing care as well as to prospective patients. We appreciate your reviews!

- Val L

Dr Contreras has repaired and replaced both knees for my husband and just recently replaced my left knee. His experience and consideration is consistent and totally reassuring.

- Sandra L

Thank you doctor for being so professional and compassionate. This doctor is wonderful.

- Tara N