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Radiation Oncologists in California

Data updated monthly · Last refresh October 2026

734 Radiation Oncology providers practice in California, including 310 (42%) offering telehealth. The largest concentration is in Los Angeles. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.

734providers
310telehealth
Los Angelestop city

Radiation Oncology by city in California

Choose a city to see providers there.

Radiation Oncology in Los Angeles97 providers
Radiation Oncology in San Francisco46 providers
Radiation Oncology in Stanford43 providers
Radiation Oncology in San Diego43 providers
Radiation Oncology in Sacramento32 providers
Radiation Oncology in Orange19 providers
Radiation Oncology in Duarte16 providers
Radiation Oncology in La Jolla15 providers
Radiation Oncology in Palo Alto14 providers
Radiation Oncology in San Jose11 providers
Radiation Oncology in Loma Linda11 providers
Radiation Oncology in West Hollywood10 providers
Radiation Oncology in Fresno9 providers
Radiation Oncology in Santa Clara9 providers
Radiation Oncology in Long Beach9 providers
Radiation Oncology in Redding8 providers
Radiation Oncology in Fountain Valley7 providers
Radiation Oncology in Santa Barbara7 providers
Radiation Oncology in Dublin7 providers
Radiation Oncology in Torrance7 providers
Radiation Oncology in Irvine7 providers
Radiation Oncology in Chula Vista6 providers
Radiation Oncology in Newport Beach6 providers
Radiation Oncology in Oakland6 providers

Radiation Oncology providers in California

Listed by city, largest first. 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. Thomas Fogel, MD
Ventura, CA · $106 in drug and device payments (2025) · (805) 648-5191
Dr. Danny Vazquez, MD
Visalia, CA · $189 in drug and device payments (2025) · (559) 624-3100
Dr. David Ly, MD
Visalia, CA · No drug or device payments recorded (2025) · (559) 624-3100
Dr. Veena Ramsinghani, MD
Visalia, CA · No drug or device payments recorded (2025) · (559) 624-3100
Dr. Youssef Hanalla, MD
Visalia, CA · $83 in drug and device payments (2025) · (559) 624-3100
Dr. Eva Lean, M.D.
Vista, CA · No drug or device payments recorded (2025) · (760) 599-9545
Dr. Norbert Kased, M.D.
Vista, CA · $127 in drug and device payments (2025) · Telehealth · (760) 599-9545
Dr. Patrick Linson, M.D.
Vista, CA · $287 in drug and device payments (2025) · Telehealth · (760) 599-9545
Dr. James Mitchell, MD
Walnut Creek, CA · $62,038 in drug and device payments (2025) · Telehealth · (925) 433-8786
Dr. Kuang-hwa Chao, M.D.
Walnut Creek, CA · $3,270 in drug and device payments (2025) · Telehealth · (925) 954-6710
Dr. Soheila Azghadi, MD
Walnut Creek, CA · $4,998 in drug and device payments (2025) · Telehealth · (925) 433-8786
Dr. Arthur Chung, MD
West Covina, CA · $514 in drug and device payments (2025) · (626) 956-8009
Dr. Edward Jung, MD
West Covina, CA · $112 in drug and device payments (2025) · (626) 225-2111
Dr. Caitlin Gomez, M.D.
West Hills, CA · No drug or device payments recorded (2025) · Telehealth · (818) 884-1683
Dr. Henry Yampolsky, M.D.
West Hills, CA · No drug or device payments recorded (2025) · (818) 884-1683
Dr. Amin Mirhadi, MD
West Hollywood, CA · $210 in drug and device payments (2025) · Telehealth · (310) 423-4206
Dr. Anthony Nguyen, MD, PHD
West Hollywood, CA · $5,658 in drug and device payments (2025) · Telehealth · (310) 423-0049
Dr. Behrooz Hakimian, MD
West Hollywood, CA · $239 in drug and device payments (2025) · Telehealth · (310) 423-4207
Dr. Benjamin King, M.D.
West Hollywood, CA · No drug or device payments recorded (2025) · Telehealth · (310) 423-8077
Dr. Christiane Burnison, MD
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-4206
Dr. Eric Chung, M.D.
West Hollywood, CA · No drug or device payments recorded (2025) · Telehealth · (310) 423-8030
Dr. Julie Jang, MD, PHD
West Hollywood, CA · No drug or device payments recorded (2025) · Telehealth · (310) 423-4208
Dr. Katelyn Atkins, M.D.
West Hollywood, CA · $384 in drug and device payments (2025) · Telehealth · (310) 423-2178
Dr. Mitchell Kamrava, MD
West Hollywood, CA · $17,968 in drug and device payments (2025) · Telehealth · (310) 423-1858
Dr. Robert Reznik, M.D.
West Hollywood, CA · No drug or device payments recorded (2025) · Telehealth · (310) 423-8077
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
Dr. James Mason, MD
Wildomar, CA · No drug or device payments recorded (2025) · (951) 696-0679
Dr. Jason Sun, M.D.
Wildomar, CA · $197 in drug and device payments (2025) · (951) 468-8588
Dr. Parima Daroui, M.D. PH.D.
Wildomar, CA · No drug or device payments recorded (2025) · Telehealth · (951) 696-0679
Dr. Randall Scharlach, MD
Woodland Hills, CA · $159 in drug and device payments (2025) · (818) 449-2700
Dr. Barbara Andersen, MD
Yucca Valley, CA · No drug or device payments recorded (2025) · (760) 365-6300

Common questions

How many Radiation Oncology providers are in California?

There are 734 Radiation Oncology providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.

Do Radiation Oncology providers in California offer telehealth?

Yes. 310 of the 734 Radiation Oncology providers in California (about 42%) report offering telehealth services in CMS data.

Which cities in California have the most Radiation Oncology providers?

Los Angeles (97), San Francisco (46), Stanford (43) have the highest concentration of Radiation Oncology providers in California.

How many Radiation Oncology providers in California received drug or device company payments?

359 of 734 Radiation Oncology providers in California (49%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

Where does this data come from?

Provider counts and profiles 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.

Do most Radiation Oncologists in California work in independent practices or large health systems?

Among 516 Radiation Oncologists in California enrolled in Medicare, 16% bill through a solo or small practice with fewer than 10 clinicians, 17% through a mid-size group of 10 to 99, and 67% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.

Which hospitals do Radiation Oncologists in California work at?

According to CMS facility affiliation records, the California hospitals where the most Radiation Oncologists hold privileges are UCSF Medical Center in San Francisco; Stanford Health Care in Stanford; UC San Diego Health Hillcrest - Hillcrest Med Ctr in San Diego.

Related reading on HealthcareDiscovery.AI

Radiation Oncology in all 50 states Search all 734 in the directory Ask Zach for help choosing

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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. Are you a Radiation Oncology in California? Get featured.