COA Member Directory Keywords: Advanced Search Directory View All Listings Sort By:Default Last Name ↑ Medical Group ↓ Medical Group City Bradley S. Greenbaum, M.D. Name Bradley S. Greenbaum, M.D. Status Active Medical Group Orange Co Ortho & Sports Medical Group City Irvine Phone 949-451-1454 Subspecialty Arthritis, Knee, Shoulder/Elbow, Sports Medicine Jack O. Piasecki, M.D. Name Jack O. Piasecki, M.D. Status Semi-Retired Medical Group Optimal Orthopedic Medical Group City Tustin Phone 714-508-1112 Subspecialty General, WC Medical-Legal, WC Treatment Ying Chi, M.D. Name Ying Chi, M.D. Status Active Medical Group OC Hand Surgery Specialist City Fountain Valley Phone 714-434-3518 Subspecialty Hand/Wrist Michael D. Began, M.D. Name Michael D. Began, M.D. Status Semi-Retired Medical Group Ocean Orthopedic Surgery City Ventura Phone 805-648-3902 Subspecialty General David J. Chao, M.D. Name David J. Chao, M.D. Status Active Medical Group Oasis Sports Medical Group, Inc. City San Diego Phone 858-571-0606 Subspecialty Sports Medicine Michael T. Bollinger, M.D. Name Michael T. Bollinger, M.D. Status Active Medical Group North Sonoma Co. Healthcare District City Healdsburg Phone 707-431-6483 Subspecialty General, Hand/Wrist, Hip, Knee, Shoulder/Elbow, Sports Medicine, Total Joint, Trauma Theodore Georgis, Jr., M.D. Name Theodore Georgis, Jr., M.D. Status Active Medical Group Northpoint Medical Consultants City San Francisco Phone 800-513-5059 Subspecialty Spine, WC Medical-Legal Christopher O. Neubuerger, M.D. Name Christopher O. Neubuerger, M.D. Status Active Medical Group Northern CA Spine & Rehabilitation City Sacramento Phone 916-773-8277 Subspecialty Spine Dennis Michael Hembd, M.D. Name Dennis Michael Hembd, M.D. Status Active Medical Group Northern CA Spine & Rehabilitation City Sacramento Phone 916-733-8277 Subspecialty Spine Mark F. Hambly, M.D. Name Mark F. Hambly, M.D. Status Active Medical Group Northern CA Spine & Rehabilitation City Sacramento Phone 916-733-8277 Subspecialty Spine ← Previous Next →