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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. Uri Zisblatt, M.D.
Covina, CA · No drug or device payments recorded (2025) · (626) 915-6280
Dr. Christina Phuong
Culver City, CA · $288 in drug and device payments (2025) · (310) 237-0461
Dr. Peter Austin, M.D.
Diamond Bar, CA · No drug or device payments recorded (2025) · (909) 568-3652
Dr. Armand Bouzaglou, M.D
Downey, CA · $249 in drug and device payments (2025) · (626) 331-6866
Dr. Andrew Raubitschek, MD
Duarte, CA · No drug or device payments recorded (2025) · (626) 359-8111
Dr. Arya Amini, M.D.
Duarte, CA · $27,883 in drug and device payments (2025) · Telehealth · (626) 256-4673
Dr. Eric Radany, MD
Duarte, CA · No drug or device payments recorded (2025) · (626) 359-8111
Dr. Heather Mcgee, MD, PHD
Duarte, CA · No drug or device payments recorded (2025) · Telehealth · (626) 256-4673
Dr. Hyun Kim, MD
Duarte, CA · $22,824 in drug and device payments (2025) · Telehealth · (800) 826-4673
Dr. Jeffrey Wong, MD
Duarte, CA · No drug or device payments recorded (2025) · (626) 359-8111
Dr. Jose Bazan, MD
Duarte, CA · $79 in drug and device payments (2025) · Telehealth · (626) 256-4673
Dr. Nayana Vora, MD
Duarte, CA · $114 in drug and device payments (2025) · (626) 359-8111
Dr. Sagus Sampath, M.D.
Duarte, CA · No drug or device payments recorded (2025) · Telehealth · (626) 359-8111
Dr. Savita Dandapani, M.D. , PH.D.
Duarte, CA · $15 in drug and device payments (2025) · Telehealth · (626) 359-8111
Dr. Scott Glaser, MD
Duarte, CA · $62 in drug and device payments (2025) · Telehealth · (626) 256-4673
Dr. Sean Maroongroge, M.D.
Duarte, CA · $1,841 in drug and device payments (2025) · Telehealth · (626) 256-4673
Dr. Stephanie Yoon, M.D.
Duarte, CA · $1,075 in drug and device payments (2025) · Telehealth · (626) 256-4673
Dr. Terence Williams, M.D.
Duarte, CA · $160 in drug and device payments (2025) · (626) 256-4673
Dr. Yi-jen Chen, MD
Duarte, CA · No drug or device payments recorded (2025) · (626) 359-8111
Dr. Yufei Liu, MD PHD
Duarte, CA · No drug or device payments recorded (2025) · Telehealth · (800) 826-4673
Dr. Amish Shah, M.D.
Dublin, CA · No drug or device payments recorded (2025) · (925) 556-5800
Dr. Anand Parthasarathy, MD, MPH
Dublin, CA · No drug or device payments recorded (2025) · (925) 556-4200
Dr. Carl Van Wey, M.D.
Dublin, CA · No drug or device payments recorded (2025) · (925) 875-1677
Dr. Gautam Prasad, M.D.
Dublin, CA · $4,691 in drug and device payments (2025) · Telehealth · (925) 875-1677
Dr. Michael Forrest, MD
Dublin, CA · No drug or device payments recorded (2025) · (510) 830-3100
Dr. Minh-phuong Huynh-le, MD
Dublin, CA · No drug or device payments recorded (2025) · (925) 556-5800
Dr. Sumi Sinha, M.D.
Dublin, CA · No drug or device payments recorded (2025) · (925) 556-5800
Dr. Rosemonde Woel, M.D.
El Centro, CA · No drug or device payments recorded (2025) · (760) 339-5620
Dr. Yuji Seo, M.D.
El Centro, CA · $14 in drug and device payments (2025) · (760) 339-5620
Dr. David Khan, MD
El Segundo, CA · $576 in drug and device payments (2025) · Telehealth · (310) 414-9990
Dr. Gopal Sachdeva, MD
Emeryville, CA · $2,606 in drug and device payments (2025) · (510) 629-6682
Dr. Dominique Rash, M.D.
Encinitas, CA · $184 in drug and device payments (2025) · Telehealth · (858) 246-0500
Dr. James Urbanic, M.D.
Encinitas, CA · $519 in drug and device payments (2025) · Telehealth · (858) 246-0500
Dr. Jonathan Bear, M.D.
Escondido, CA · $3,223 in drug and device payments (2025) · Telehealth · (760) 735-7800
Dr. Paul Volpp, MD
Escondido, CA · $257 in drug and device payments (2025) · Telehealth · (760) 739-3371
Dr. Douglas Kelly, MD
Eureka, CA · $408 in drug and device payments (2025) · (707) 269-4229
Dr. Join Luh, M.D.
Eureka, CA · $2,549 in drug and device payments (2025) · Telehealth · (707) 269-4229
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 Kabolizadeh
Fountain Valley, CA · $760 in drug and device payments (2025) · (714) 962-7100
Dr. Quoc-anh Ho, MD
Fountain 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, MD
Fountain Valley, CA · $154 in drug and device payments (2025) · Telehealth · (714) 962-7100
Dr. Christine Chang-halpenny, M.D.
Fresno, CA · $1,079 in drug and device payments (2025) · Telehealth · (559) 326-1222
Dr. Giatri Dave, MD
Fresno, CA · No drug or device payments recorded (2025) · (209) 543-0684
Dr. Jedidiah Monson, MD
Fresno, CA · $386 in drug and device payments (2025) · (559) 326-1222
Dr. Li Liu, MD
Fresno, CA · $112 in drug and device payments (2025) · Telehealth · (559) 437-1000
Dr. Madhu John, MD
Fresno, CA · No drug or device payments recorded (2025) · (559) 450-5500
Dr. Raymond Tan, MD
Fresno, CA · $207 in drug and device payments (2025) · (559) 437-1000

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.

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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.