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Radiation Oncology in Los Angeles, California

Data updated monthly · Last refresh September 2026

97 Radiation Oncology providers practice in Los Angeles, and 41% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Radiation Oncology providers in Los Angeles

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. Lindsay Hwang, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 865-3050
Dr. Luca Valle, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 825-0867
Dr. Margaret Soper, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 783-6570
Dr. Matthew Farrell
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 825-9775
Dr. Michael Girvigian, MD
Los Angeles, CA · $458 in drug and device payments (2025) · (323) 783-4011
Dr. Michael Miller, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (833) 574-2273
Dr. Michael Selch, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-0128
Dr. Michael Steinberg, MD
Los Angeles, CA · $99 in drug and device payments (2025) · Telehealth · (310) 825-0128
Dr. Michael Tome, MD
Los 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 Xiang
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 825-9775
Dr. Minha Lee, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-9775
Dr. Monica Ryoo, MD
Los 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, MD
Los 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, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-0128
Dr. Priya Mitra, MD
Los 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, MD
Los Angeles, CA · $1,120 in drug and device payments (2025) · (323) 783-4011
Dr. Richard Jennelle, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 865-3050
Dr. Ricky Savjani, MD/PHD
Los Angeles, CA · $4,848 in drug and device payments (2025) · Telehealth · (310) 825-9775
Dr. Robert Chin, MD, PHD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 301-9775
Dr. Robert Zimmerman, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (213) 724-5634
Dr. Robyn Banerjee, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 206-2510
Dr. Ronald Lau, MD
Los Angeles, CA · $33 in drug and device payments (2025) · (323) 865-3050
Dr. Rosa Ong, MD
Los Angeles, CA · $29 in drug and device payments (2025) · (323) 783-4011
Dr. Roy Vongtama, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 825-0128
Dr. Sai Duriseti
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 478-3711
Dr. Samuel Shin, MD
Los Angeles, CA · $36 in drug and device payments (2025) · (323) 783-4011
Dr. Sara Kim, M.D.
Los Angeles, CA · $57 in drug and device payments (2025) · Telehealth · (310) 825-9775
Dr. Shahrokh Iganej, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Sharon Lu, M.D.
Los Angeles, CA · $28 in drug and device payments (2025) · (714) 644-6030
Dr. Shelly Bian, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 865-3050
Dr. Simon Ro, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Stella Yoo, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 865-3050
Dr. Steve Lee, MD
Los Angeles, CA · $138 in drug and device payments (2025) · (310) 825-9775
Dr. Steven Lau
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 825-9776
Dr. Sun Gim, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Susan Mccloskey, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 825-0128
Dr. Tania Kaprealian, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 825-0128
Dr. Teri Katz, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Trudy Wu, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 825-9775
Dr. Vishruth Reddy, M.D., PH.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 267-9099
Dr. William Lorentz, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 268-3390
Dr. Winston Lien, MD
Los Angeles, CA · $843 in drug and device payments (2025) · (323) 783-2841

Common questions

How many Radiation Oncology providers are in Los Angeles, California?

There are 97 Radiation Oncology providers with active NPI records practicing in Los Angeles, according to federal NPPES data refreshed monthly.

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

40 of 97 (41%) 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 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 Los Angeles Radiation Oncology across California

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
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.