HealthcareDiscovery.AI / Doctors / California / Orange / Surgical Oncology

Surgical Oncology in Orange, California

Data updated monthly · Last refresh September 2026

12 Surgical Oncology providers practice in Orange. Listings are drawn from federal public records and are not endorsements.

Surgical Oncology providers in Orange

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. Alexandra Lopez-aguiar, M.D.
Orange, CA · $468 in drug and device payments (2025) · (714) 456-7890
Dr. Brittany Sullivan, M.D.
Orange, CA · No drug or device payments recorded (2025) · (714) 456-7890
Dr. Erin Lin, D.O.
Orange, CA · $271 in drug and device payments (2025) · Telehealth · (714) 880-7812
Dr. Glenn Allison, M.D.
Orange, CA · No drug or device payments recorded (2025) · (714) 633-9761
Dr. Holly Yong, M.D.
Orange, CA · $157 in drug and device payments (2025) · Telehealth · (714) 880-7812
Dr. James Jakowatz, MD
Orange, CA · No drug or device payments recorded (2025) · (714) 456-8171
Dr. John A Butler, MD
Orange, CA · $27 in drug and device payments (2025) · (714) 456-8978
Dr. Karen T Lane, MD
Orange, CA · $279 in drug and device payments (2025) · Telehealth · (714) 456-8978
Dr. Melissa Mao, MD
Orange, CA · $51 in drug and device payments (2025) · Telehealth · (714) 456-8000
Dr. Oliver Eng, M.D.
Orange, CA · $28,113 in drug and device payments (2025) · Telehealth · (714) 880-7812
Dr. Thuy Tran, M.D.
Orange, CA · $58 in drug and device payments (2025) · Telehealth · (714) 456-7890
Dr. Valentina Bonev
Orange, CA · No drug or device payments recorded (2025) · (714) 571-5900

Common questions

How many Surgical Oncology providers are in Orange, California?

There are 12 Surgical Oncology providers with active NPI records practicing in Orange, 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 Orange Surgical Oncology 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.