Radiation Oncology in California
860 licensed radiation oncologists practicing in California across 214 cities.
This page republishes public records from the federal NPI Registry, which every licensed U.S. healthcare provider is required to maintain. These are federal-agency records, not a directory we compile.
Source: NPI Registry · last checked
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Click a city to filter the 50 providers shown below. California has providers in 214 cities total — search the full NPI Registry for cities not shown here.
NPI Registry records — Radiation Oncology in California
29 of 50 shown have disclosed payments in CMS Open Payments (2024)
Showing 50 of 860 federal NPI records, alphabetical by last name. Contact details come directly from the NPI Registry — verify currency with the provider's office. Pharma / device payment disclosures from CMS Open Payments are shown where the physician appears in that federal database.
Christina Marie Abel, NURSE PRACTITIONER
1000 W La Veta Ave
Orange, CA 92868 · (714) 734-6256
License: NP95007238 (CA)
In 2024, $557 was disclosed to this physician across 18 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($557).
Largest single payer: EISAI INC. ($116).
Jonathan Alan Abelson, MD
2230 Lynn Rd Ste 103
Thousand Oaks, CA 91360 · (805) 496-4111
License: A105322 (CA)
In 2023, $166 was disclosed to this physician across 4 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($166).
Roy Eugene Abendroth, MD
2333 Buchanan St
San Francisco, CA 94115 · (209) 342-2300
License: G60844 (CA)
In 2024, $266 was disclosed to this physician across 4 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($266).
Largest single payer: Novocure Inc. ($172).
Sunil Jeram Advani, MD
3855 Health Sciences Dr # 843, Ucsd Moores Cancer Center Dept Radiation Oncology
La Jolla, CA 92093 · (858) 822-4364
License: A110025 (CA)
In 2023, $142 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($142).
Ankit Agarwal, MD
1 Infinity Corp Ctr Dr Ste 101
Garfield Heights, OH 44125 · (650) 940-7280
License: A176205 (CA)
In 2024, $900 was disclosed to this physician across 19 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($900).
Largest single payer: Telix Pharmaceuticals ($285).
Faisal Ahmed, MD
Stanford Medical Center, Dept. of Radiation Oncology, 875 Blake Wilbur Dr Rm 305
Stanford, CA 94305 · (650) 723-6171
License: A137401 (CA)
In 2023, $361 was disclosed to this physician across 3 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($361).
In 2024, $271 was disclosed to this physician across 12 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($271).
Largest single payer: Sumitomo Pharma America, Inc. ($233).
Jes Alexander
1600 Divisadero St # H1031
San Francisco, CA 94143 · (415) 353-9880
License: A114416 (CA)
In 2024, $156 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($156).
Largest single payer: RefleXion Medical, Inc. ($156).
In 2024, $159 was disclosed to this physician across 7 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($159).
Largest single payer: Myriad Genetic Laboratories, Inc. ($72).
Martin Sebastian Allen-Auerbach, MD
200 Ucla Medical Plz Ste B114
Los Angeles, CA 90095 · (310) 794-1005
License: A80245 (CA)
In 2024, $18 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($18).
Largest single payer: Cardinal Health 414 LLC ($18).
Zahora Nicola Ally, MD
4721 Dallas Ranch Rd
Antioch, CA 94531 · (925) 778-0679
License: ME89834 (FL)
In 2024, $1,520 was disclosed to this physician across 67 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($1,520).
Largest single payer: Merck Sharp & Dohme LLC ($234).
Munther E Alqaisi, MD
1800 Medical Center Dr Ste 100
San Bernardino, CA 92411 · (909) 887-8800
License: A39982 (CA)
In 2024, $27 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($27).
Largest single payer: Siemens Medical Solutions USA, Inc. ($27).
Farhan Syed Amanullah, MD
300 Pasteur Dr Rm H1307
Stanford, CA 94305 · (650) 723-8463
License: A146686 (CA)
In 2024, $3,311 was disclosed to this physician across 137 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($3,311).
Largest single payer: AstraZeneca Pharmaceuticals LP ($295).
In 2024, $30,522 was disclosed to this physician across 20 transactions by pharmaceutical or medical-device companies.
Mostly consulting fees ($23,845) and charitable contributions ($3,586).
Largest single payer: AstraZeneca Pharmaceuticals LP ($28,903).
Barbara G. Andersen, MD
58295 29 Palms Hwy
Yucca Valley, CA 92284 · (760) 365-6300
License: G52853 (CA)
In 2024, $28 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($28).
Largest single payer: Tempus AI, Inc ($28).
Ellis James Andras, MD
2801 K St, Suite 502
Sacramento, CA 95816 · (877) 515-0053
License: C34993 (CA)
Moshiur Mekhail Anwar, MD, PHD
1825 4th St, M2260
San Francisco, CA 94158 · (415) 353-7175
License: 114910 (CA)
In 2024, $23 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($23).
Largest single payer: Siemens Medical Solutions USA, Inc. ($23).
Sammy Mohamed Ashouri, MD
300 Pasteur Dr Rm H1330
Stanford, CA 94305 · (650) 725-1812
License: A160913 (CA)
In 2024, $108 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($108).
Largest single payer: Medtronic, Inc. ($108).
Osman Omar Atiq, MD
11234 Anderson St Dept of
Loma Linda, CA 92354 · (909) 558-4000
License: E-14140 (AR)
Katelyn Mae Atkins, MD
8700 Beverly Blvd
West Hollywood, CA 90048 · (310) 423-2178
License: A162728 (CA)
Peter Allison Austin, MD
1655 Aspen Grove Ln
Diamond Bar, CA 91765 · (909) 568-3652
License: GFE24628 (CA)
In 2024, $2,660 was disclosed to this physician across 97 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($2,660).
Largest single payer: AstraZeneca Pharmaceuticals LP ($442).
Hilary Petersmeyer Bagshaw, MD
300 Pasteur Dr
Stanford, CA 94305 · (650) 736-2457
License: A133849 (CA)
In 2024, $213 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($213).
Largest single payer: Sumitomo Pharma America, Inc. ($213).
In 2024, $94 was disclosed to this physician across 3 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($94).
Largest single payer: Telix Pharmaceuticals ($78).
Leslie Ballas, MD
1441 Eastlake Ave, Nor G-350
Los Angeles, CA 90089 · (323) 865-3050
License: A111990 (CA)
In 2023, $1,700 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly stock or ownership interest ($1,700).
Robyn Nathan Banerjee, MD
200 Medical Plz, B265
Los Angeles, CA 90095 · (310) 206-2510
License: A122036 (CA)
Franklin Banker, MD
3581 Palmer Dr, Ste 303
Cameron Park, CA 95682 · (530) 672-1351
License: G26302 (CA)
In 2024, $999 was disclosed to this physician across 22 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($999).
Largest single payer: RefleXion Medical, Inc. ($198).
In 2023, $232 was disclosed to this physician across 3 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($232).
Carolyn Joy Barnes, MD
40055 Bob Hope Dr
Rancho Mirage, CA 92270 · (760) 202-3946
License: A113217 (CA)
In 2023, $420 was disclosed to this physician across 8 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($420).
Todd A Barnett, MD
1221 Madison, 1st Floor, C/o Swedish Cancer Institute
Seattle, WA 98104 · (206) 386-2323
License: MD00030885 (WA)
Sukhjeet Singh Batth, MD
7130 N Millbrook Ave
Fresno, CA 93720 · (559) 326-1222
License: A126928 (CA)
In 2024, $896 was disclosed to this physician across 39 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($896).
Largest single payer: Daiichi Sankyo Inc. ($164).
In 2024, $84 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($84).
Largest single payer: GE HealthCare ($84).
Patrick Liam Beagen
4650 Jefferson Ln Ne
Albuquerque, NM 87109 · (505) 727-7900
License: MD2024-0713 (NM)
In 2024, $29 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($29).
Largest single payer: Incyte Corporation ($29).
Jonathan Read Bear, MD
2125 Citracado Pkwy Ste 110
Escondido, CA 92029 · (760) 735-7800
License: A126546 (CA)
In 2024, $61 was disclosed to this physician across 3 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($61).
Largest single payer: Blue Earth Diagnostics Limited ($23).
Joseph Charles Beck, MD
4721 Dallas Ranch Rd
Antioch, CA 94531 · (925) 778-0679
License: G17713 (CA)
Robert Charles Beckmann, MD
Naval Medical Ctr, 34800 Bob Wilson Drive
San Diego, CA 92134 · (619) 532-6400
License: A191291 (CA)
Cecil Mayra Benitez, MD, PHD
1100 San Bernardino Rd Ste 1100
Upland, CA 91786 · (909) 949-2242
License: A188987 (CA)
In 2024, $122 was disclosed to this physician across 4 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($122).
Largest single payer: Boston Scientific Corporation ($122).
Showing 50 of 860. Search all on NPI Registry →
Payment totals shown for the latest published program year (2024). Presence of disclosed payments is not, on its own, a conflict of interest. Physicians dispute records directly with CMS (dispute process). How we show this.
Open Payments figures as displayed on . Corrections flow from the manufacturer through CMS and are adopted on our next refresh.
What this page is: a republication of public federal NPI Registry records, filtered to the radiation oncology taxonomy. It is not a directory we curate, and inclusion is automatic based on each provider's own NPI filing with CMS. Providers who believe their NPI record is inaccurate should update it directly with CMS at npiregistry.cms.hhs.gov; our next refresh adopts the corrected federal record.
Practice info disclaimer: Provider addresses and phone numbers come from the NPI Registry, which providers update at their discretion. Always call ahead to confirm the provider is currently accepting patients and is at the listed address.
Medical disclaimer: This page is not a quality ranking and does not constitute medical advice or endorsement. Choose a provider in consultation with your primary care physician or care team.
Source: NPI Registry (taxonomy: Radiation Oncology) · Last checked: 2026-04-20