California Orthopaedic Association

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  • Home
  • About COA
    • Origin & History
    • Mission
    • Bylaws
    • COA Board of Directors – Committee Chairs – Roster
    • Advertising
    • Staff
    • Contact/Forms
  • Membership
    • Join COA
    • Members
    • COA Member Directory
    • Member Discounts
    • Residents
    • Job Bank
    • Expense Form
  • Annual Meeting/QME Course
    • 2025 Annual Meeting/QME Course
    • Print CME Certificates
    • Future Meetings
    • Past Annual Meetings & QME Courses

COA Member Directory

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Timothy J. Perrin, M.D.

Name
Timothy J. Perrin, M.D.
Status
Semi-Retired
City
Arroyo Grande
Phone
805-489-2448
Subspecialty
General, WC Medical-Legal, WC Treatment

Glen O’Sullivan, M.D.

Name
Glen O’Sullivan, M.D.
Status
Active
Medical Group
Ashlan Orthopedic Associates
City
Ashland
Phone
541-482-4573
Subspecialty
General

Michael F. Dillingham, M.D.

Name
Michael F. Dillingham, M.D.
Status
Active
City
Atherton
Phone
650-474-1855
Subspecialty
Sports Medicine

Susan L. Lewis, M.D.

Name
Susan L. Lewis, M.D.
Status
Active
City
Atherton
Phone
415-353-6400
Subspecialty
Sports Medicine

Alfred J. Coppola, Jr., M.D.

Name
Alfred J. Coppola, Jr., M.D.
Status
Active
Medical Group
Bakersfield Orthopedic Medical Group
City
Bakersfield
Phone
661-203-7345
Subspecialty
General

Christopher D. Hamilton, M.D.

Name
Christopher D. Hamilton, M.D.
Status
Active
Medical Group
SCOI
City
Bakersfield
Phone
661-328-5565
Subspecialty
Knee, Shoulder/Elbow, Sports Medicine, WC Treatment

George Wahba, M.D.

Name
George Wahba, M.D.
Status
Active
Medical Group
Mercy Orthopedic Spine & Hand Center
City
Bakersfield
Phone
661-663-6550
Subspecialty
General, Spine

Howard R. Brown, M.D.

Name
Howard R. Brown, M.D.
Status
Active
City
Bakersfield
Phone
661-716-9410
Subspecialty
Arthritis, General, Hip, Knee, Pediatrics, Shoulder/Elbow, Sports Medicine, Total Joint, Trauma, WC Treatment

James B. Grimes, M.D.

Name
James B. Grimes, M.D.
Status
Active
Medical Group
Kern Bone & Joint Specialist
City
Bakersfield
Phone
661-324-2491
Subspecialty
Hand/Wrist, Hip, Knee, Shoulder/Elbow, Sports Medicine, WC Treatment

Mark L. Schamblin, M.D.

Name
Mark L. Schamblin, M.D.
Status
Active
Medical Group
SCOI
City
Bakersfield
Phone
661-328-5565
Subspecialty
Knee, Shoulder/Elbow, Sports Medicine, WC Treatment
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Annual Meeting/QME Course

2026 Annual Meeting
Hilton Santa Barbara Beachfront Resort
April 16 – 19, 2026

Upcoming COA Events

  • Thu
    16
    Apr
    2026
    Sun
    19
    Apr
    2026

    2026 Annual Meeting/QME Course

    Hilton Santa Barbara Beachfront Resort

Get in Touch With Us

California Orthopaedic Association
1246 P Street
Sacramento, CA 95814

Phone: 916-454-9884
Fax: 916-454-9882
Email: admin@coa.org

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