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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Gregg R. Sobeck, M.D.

Name
Gregg R. Sobeck, M.D.
Status
Active
Medical Group
Los Angeles Orthopaedic Institute
City
Sherman Oaks
Phone
818-905-2222
Subspecialty
Foot/Ankle, General, Hand/Wrist, Hip, Knee, Shoulder/Elbow, Sports Medicine, Total Joint, WC Treatment

Jonathan Botts, M.D.

Name
Jonathan Botts, M.D.
Status
Active
Medical Group
Los Angeles Orthopaedic Institute
City
Sherman Oaks
Phone
818-905-2222
Subspecialty
General, Hand/Wrist, Hip, Knee, Shoulder/Elbow, Sports Medicine

Jonathan Nassos, M.D.

Name
Jonathan Nassos, M.D.
Status
Active
City
Sherman Oaks
Phone
818-788-2400
Subspecialty
General, Hip, Knee, Shoulder/Elbow, Sports Medicine, Total Joint, WC Medical-Legal, WC Treatment

Mitchel U. Silverman, M.D.

Name
Mitchel U. Silverman, M.D.
Status
Active
City
Sherman Oaks
Phone
818-990-4263
Subspecialty
Hand/Wrist, WC Medical-Legal

Philip H. Conwisar, M.D.

Name
Philip H. Conwisar, M.D.
Status
Active
City
Sherman Oaks
Phone
818-784-1354
Subspecialty
General, Knee, Shoulder/Elbow, Sports Medicine, WC Treatment

Richard E. Nussbaum, M.D.

Name
Richard E. Nussbaum, M.D.
Status
Active
Medical Group
Los Angeles Orthopaedic Institute
City
Sherman Oaks
Phone
818-905-2222
Subspecialty
Spine, WC Medical-Legal, WC Treatment

Shrey Kanjiya, M.D.

Name
Shrey Kanjiya, M.D.
Status
Young Orthopedist
Medical Group
Los Angeles Orthopaedic Institute
City
Sherman Oaks
Phone
818-905-2222
Subspecialty
Hand/Wrist, Hip, Knee, Shoulder/Elbow, Sports Medicine, Total Joint

Daniel K. Davis, M.D.

Name
Daniel K. Davis, M.D.
Status
Active
Medical Group
Ventura Orthopedics
City
Simi Valley
Phone
805-520-2663
Subspecialty
Sports Medicine

Deborah Castaneda, M.D.

Name
Deborah Castaneda, M.D.
Status
Active
Medical Group
SCOI
City
Simi Valley
Phone
805-578-8550
Subspecialty
Foot/Ankle, WC Treatment

Gregg P. Hartman, M.D.

Name
Gregg P. Hartman, M.D.
Status
Active
Medical Group
Ventura Orthopedics
City
Simi Valley
Phone
805-527-1404
Subspecialty
General
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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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