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Radiation Oncology in Whittier, California

Data updated monthly · Last refresh September 2026

4 Radiation Oncology providers practice in Whittier. Listings are drawn from federal public records and are not endorsements.

Radiation Oncology providers in Whittier

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. Jeffrey Yuen, M.D.

Whittier, CA · No drug or device payments recorded (2025) · (562) 696-5964

Dr. Kevin Diao, MD

Whittier, CA · $18 in drug and device payments (2025) · Telehealth · (562) 696-5964

Dr. Richard Li, MD

Whittier, CA · $42 in drug and device payments (2025) · Telehealth · (562) 698-0811

Dr. William Kurohara, M.D.

Whittier, CA · No drug or device payments recorded (2025) · (562) 696-5964

Common questions

How many Radiation Oncology providers are in Whittier, California?

There are 4 Radiation Oncology providers with active NPI records practicing in Whittier, 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 Whittier Radiation Oncology across California

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.