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Surgery in San Ramon, California

Data updated monthly · Last refresh September 2026

6 Surgery providers practice in San Ramon. Listings are drawn from federal public records and are not endorsements.

Surgery providers in San Ramon

Listed alphabetically. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Aileen Murphy, D.O.
San Ramon, CA · $33,493 in drug and device payments (2025) · Telehealth · (925) 338-8511
Dr. Barry Gardiner, M.D.
San Ramon, CA · No drug or device payments recorded (2025) · (925) 275-1210
Dr. Jing Zhou, M.D.
San Ramon, CA · $172 in drug and device payments (2025) · (925) 277-1055
Dr. Michael Wynn, MD
San Ramon, CA · $132 in drug and device payments (2025) · (925) 277-1055
Dr. Ron Cooper, M.D.
San Ramon, CA · No drug or device payments recorded (2025) · (925) 725-4228
Dr. William Hamstra, D.O.
San Ramon, CA · No drug or device payments recorded (2025) · (925) 447-0660

Common questions

How many Surgery providers are in San Ramon, California?

There are 6 Surgery providers with active NPI records practicing in San Ramon, according to federal NPPES data refreshed monthly.

Where does this data come from?

Provider records come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

All specialties in San Ramon Surgery across California

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory.