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
    • 2026 Annual Meeting/QME Course
    • Print CME Certificates
    • Future Meetings
    • Past Annual Meetings & QME Courses

COA Member Directory

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Thomas C. Degenhardt, M.D.

Name
Thomas C. Degenhardt, M.D.
Status
Active
Medical Group
Santa Rosa Orthopaedic Med Group
City
Santa Rosa
Phone
707-546-1922
Subspecialty
General, Knee, Shoulder/Elbow, Sports Medicine, Total Joint, WC Treatment

Thomas C. Merchant, M.D.

Name
Thomas C. Merchant, M.D.
Status
Semi-Retired
Medical Group
Roseville Ortho Surgery & Sports Medicine
City
Roseville
Phone
916-782-1217
Subspecialty
Knee, Sports Medicine

Thomas D. Ferro, M.D.

Name
Thomas D. Ferro, M.D.
Status
Active
Medical Group
Bone & Joint Center
City
Arroyo Grande
Phone
805-481-3685
Subspecialty
Arthritis, Hand/Wrist, Hip, Knee, Shoulder/Elbow, Sports Medicine, Total Joint, WC Treatment

Thomas G. Sampson, M.D.

Name
Thomas G. Sampson, M.D.
Status
Semi-Retired
Medical Group
Post Street Orthopaedics & Sports Medicine
City
San Francisco
Phone
415-345-9400
Subspecialty
Arthritis, Hip, Knee, Shoulder/Elbow, Total Joint

Thomas J. Blumenfeld, M.D.

Name
Thomas J. Blumenfeld, M.D.
Status
Active
Medical Group
Stanford - Orthopaedic Department
City
Redwood City
Phone
650-725-6134
Subspecialty
Arthritis, Hip, Knee, Total Joint, WC Treatment

Thomas J. Grogan, M.D.

Name
Thomas J. Grogan, M.D.
Status
Active
Medical Group
Pacific Coast Sports Medicine
City
Los Angeles
Phone
310-828-5441
Subspecialty
Pediatrics, Sports Medicine

Thomas J. Horn, M.D.

Name
Thomas J. Horn, M.D.
Status
Active
Medical Group
Ventura Orthopedics
City
Ventura
Phone
805-641-6415
Subspecialty
General, Hip, Knee, Shoulder/Elbow, Sports Medicine, Total Joint

Thomas Jin Kim, M.D.

Name
Thomas Jin Kim, M.D.
Status
Active
Medical Group
California Orthopedics & Spine
City
Larkspur
Phone
415-927-5300
Subspecialty
Hand/Wrist

Thomas K. Donaldson, M.D.

Name
Thomas K. Donaldson, M.D.
Status
Active
Medical Group
Loma Linda - Orthopedic Dept.
City
Loma Linda
Phone
909-882-5867
Subspecialty
Arthritis, Knee, Total Joint

Thomas Mark Hartley, M.D.

Name
Thomas Mark Hartley, M.D.
Status
Inactive
Medical Group
Community Medical Group of Riverside
City
Riverside
Phone
951-999-1853
Subspecialty
Sports Medicine, WC Medical-Legal
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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

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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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