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 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. Derek Go, MD, MSLos Angeles, CA · $36 in drug and device payments (2025) ·
(833) 574-2273 Dr. Diana Gage, M.D., PH.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(310) 478-3711 Dr. Diane Ling, M.D.Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth ·
(323) 865-3050 Dr. Drew Moghanaki, MDLos Angeles, CA · $15,892 in drug and device payments (2025) · Telehealth ·
(310) 825-9775 Dr. Edward Brunngraber, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(323) 783-4011 Dr. Eric Chang, M.D.Los Angeles, CA · $1,273 in drug and device payments (2025) · Telehealth ·
(323) 865-3050 Dr. Fahad Momin, CMDLos Angeles, CA · No drug or device payments recorded (2025) ·
(323) 409-5025 Dr. Florence Wright, M.D.Los Angeles, CA · $156 in drug and device payments (2025) · Telehealth ·
(310) 825-9771 Dr. Hanako Farol, D.O.Los Angeles, CA · $36 in drug and device payments (2025) · Telehealth ·
(323) 783-7571 Dr. Hany Elsaleh, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 825-0128 Dr. Harry Cosmatos, MDLos Angeles, CA · $121 in drug and device payments (2025) ·
(323) 783-4011 Dr. Hirsch Matani, MDLos Angeles, CA · $130 in drug and device payments (2025) · Telehealth ·
(323) 865-3050 Dr. Jason Ye, M.D.Los Angeles, CA · $3,757 in drug and device payments (2025) · Telehealth ·
(323) 865-3050 Dr. Jeannie Han, MDLos Angeles, CA · $28 in drug and device payments (2025) ·
(323) 783-5187 Dr. Jennifer Ho, MDLos Angeles, CA · $122 in drug and device payments (2025) ·
(323) 865-3050 Dr. Jie Deng, MDPHDLos Angeles, CA · No drug or device payments recorded (2025) · Telehealth ·
(310) 825-9775 Dr. John Hegde, M.D.Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth ·
(310) 825-9775 Dr. Jonathan Waxer, MDLos Angeles, CA · $19 in drug and device payments (2025) ·
(323) 783-2841 Dr. Joshua Schiff, MDLos Angeles, CA · $131 in drug and device payments (2025) · Telehealth ·
(323) 865-3050 Dr. Judith Ford, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 825-0128 Dr. Julie Hwang, MDLos Angeles, CA · $22 in drug and device payments (2025) ·
(323) 783-4011 Dr. Julie Santelli, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(323) 865-3050 Dr. Kekoa Taparra, MD, PHDLos Angeles, CA · $4,100 in drug and device payments (2025) · Telehealth ·
(310) 825-9775 Dr. Kenneth Lodin, MDLos Angeles, CA · No drug or device payments recorded (2025) · Telehealth ·
(323) 783-4011 Dr. Kenneth Wong, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(323) 865-3050 Dr. Kevin Holland, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(323) 783-4011 Dr. Khatija Syed, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(424) 338-2006 Dr. Lauren Lukas, MDLos Angeles, CA · $144 in drug and device payments (2025) · Telehealth ·
(323) 865-3050 Dr. Leslie Ballas, MDLos Angeles, CA · No drug or device payments recorded (2025) · Telehealth ·
(323) 865-3050 Dr. Lindsay Hwang, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(323) 865-3050 Dr. Luca Valle, MDLos Angeles, CA · No drug or device payments recorded (2025) · Telehealth ·
(310) 825-0867 Dr. Margaret Soper, MDLos Angeles, CA · No drug or device payments recorded (2025) · Telehealth ·
(323) 783-6570 Dr. Matthew FarrellLos Angeles, CA · No drug or device payments recorded (2025) · Telehealth ·
(310) 825-9775 Dr. Michael Girvigian, MDLos Angeles, CA · $458 in drug and device payments (2025) ·
(323) 783-4011 Dr. Michael Miller, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(833) 574-2273 Dr. Michael Selch, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 825-0128 Dr. Michael Steinberg, MDLos Angeles, CA · $99 in drug and device payments (2025) · Telehealth ·
(310) 825-0128 Dr. Michael Tome, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(323) 783-4011 Dr. Michael Wong, M.D.Los Angeles, CA · $203 in drug and device payments (2025) ·
(310) 825-6774 Dr. Michael XiangLos Angeles, CA · No drug or device payments recorded (2025) · Telehealth ·
(310) 825-9775 Dr. Minha Lee, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 825-9775 Dr. Monica Ryoo, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(323) 783-4011 Dr. Omar Ragab, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(323) 865-3050 Dr. Onita Bhattasali, M.D., M.P.H.Los Angeles, CA · $137 in drug and device payments (2025) · Telehealth ·
(323) 783-2841 Dr. Patrick Kupelian, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 825-0128 Dr. Paul Duong, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(310) 825-9771 Dr. Phillip Beron, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 825-0128 Dr. Priya Mitra, MDLos Angeles, CA · No drug or device payments recorded (2025) · Telehealth ·
(323) 865-3050 Dr. Puja Venkat, M.D.Los Angeles, CA · $160 in drug and device payments (2025) · Telehealth ·
(310) 825-9775 Dr. Ricardo Wang, MDLos Angeles, CA · $1,120 in drug and device payments (2025) ·
(323) 783-4011 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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