Radiation Oncology in Fountain Valley, California
Data updated monthly · Last refresh September 2026
7 Radiation Oncology providers practice in Fountain Valley. Listings are drawn from federal public records and are not endorsements.
Radiation Oncology providers in Fountain Valley
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. Ajmel Puthawala, M.D.Fountain Valley, CA · No drug or device payments recorded (2025) ·
(714) 962-7100 Dr. Asif Harsolia, M.D.Fountain Valley, CA · $394 in drug and device payments (2025) ·
(714) 962-7100 Dr. Donald Karon, M.D.Fountain Valley, CA · No drug or device payments recorded (2025) ·
(714) 549-0988 Dr. Peyman KabolizadehFountain Valley, CA · $760 in drug and device payments (2025) ·
(714) 962-7100 Dr. Quoc-anh Ho, MDFountain Valley, CA · No drug or device payments recorded (2025) · Telehealth ·
(714) 210-0140 Dr. Regiane De Andrade, M.D.Fountain Valley, CA · $29 in drug and device payments (2025) ·
(714) 210-0140 Dr. Usama Mahmood, MDFountain Valley, CA · $154 in drug and device payments (2025) · Telehealth ·
(714) 962-7100 Common questions
How many Radiation Oncology providers are in Fountain Valley, California?There are 7 Radiation Oncology providers with active NPI records practicing in Fountain Valley, 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 Fountain Valley Radiation Oncology across California
