NPPES file of Aug 9, 2026

Radiation Oncology Physician in California

735 NPPES records list radiation oncology physician with a practice address in California, 1.9 per 100,000 residents, the 33rd highest rate of 51. Los Angeles and San Francisco have the most; each record links to the provider's NPI and the California license search. Page 11 of 15.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 2085R0001X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Los Angeles has the most, 98

  1. Los Angeles98
  2. San Francisco44
  3. San Diego43
  4. Stanford43
  5. Sacramento32

Radiation Oncology Physician records in California

  1. Christina PhuongCulver City, CA 902321114439684
  2. Miljenko Pilepich, M.D.Malibu, CA 902651265772982
  3. William Podolsky, M.D., PH.DFresno, CA 937201588639710
  4. Joseph Poen, MDGreenbrae, CA 949041972585941
  5. Erqi PollomPalo Alto, CA 943041932475902
  6. Gautam Prasad, M.D.Dublin, CA 945681275755621
  7. Bradley Prestidge, MDSan Diego, CA 921211134126220
  8. Nicolas Prionas, MD, PHDSan Francisco, CA 941431972840361
  9. Anthony Pu, MDSacramento, CA 958161720084395
  10. Ajmel Puthawala, M.D.Fountain Valley, CA 927081245249325
  11. Yushen Qian, M.D.Stanford, CA 943051093154395
  12. Aimee Quan, MDLos Angeles, CA 900271376614321
  13. Tony Quang, M.D.Sacramento, CA 958171457334534
  14. Eric Radany, MDDuarte, CA 910101346346897
  15. Omar Ragab, M.D.Los Angeles, CA 900891578880670
  16. Elham Rahimy, M.D.Stanford, CA 943051376084558
  17. Sophia Rahman, M.D.Pleasant Hill, CA 945231831266741
  18. Douglas Rahn, M.D.Chula Vista, CA 919141609018340
  19. Jagdeep Raince, MDSanta Clara, CA 950511417236274
  20. Ann Raldow, M.D.Los Angeles, CA 900951952690398
  21. David Raleigh, M.D., PH.D.San Francisco, CA 941431437424793
  22. Ravichandran Ramakrishnan, MDGilroy, CA 950201508390816
  23. Veena Ramsinghani, MDVisalia, CA 932771871568097
  24. Aroor Rao, MDLos Angeles, CA 900271831266832
  25. Nikhil Rao, MDRohnert Park, CA 949281275737850
  26. Shyam Rao, M.D., PH.D.Sacramento, CA 958171265559694
  27. Yallapragada Rao, M.D.Pomona, CA 917671871503490
  28. Yuan Rao, MDPalo Alto, CA 943041780023374
  29. Allan Rappaport, M.D., J.D.Tiburon, CA 949201346310539
  30. Dominique Rash, M.D.Encinitas, CA 920241699908640
  31. Afshin Rashtian, MDRiverside, CA 925011245388289
  32. Andrew Raubitschek, MDDuarte, CA 910101407941289
  33. Vishruth Reddy, M.D., PH.D.Los Angeles, CA 900951215399233
  34. James Rembert, MDBerkeley, CA 947041124080916
  35. Atefeh Rezaei, MDLos Angeles, CA 900951578191912
  36. Robert Reznik, M.D.West Hollywood, CA 900481881906006
  37. David Rickles, MDLawndale, CA 902601700926862
  38. Simon Ro, MDLos Angeles, CA 900271508925132
  39. Jeffrey Rodnick, MDVentura, CA 930031972595882
  40. Brian Ronson, MDTemecula, CA 925921750364493
  41. Brent Rose, M.D.La Jolla, CA 920931518250869
  42. Christopher Rose, M.D.Burbank, CA 915051952309569
  43. Sara Rosenthal, M.D.San Diego, CA 921011043218589
  44. Seth Rosenthal, M.D.Sacramento, CA 958161881690584
  45. Jason Ross, MDStanford, CA 943051649629155
  46. Carl Rossi, M.D.San Diego, CA 921211518983055
  47. Mark Rounsaville, MDNicasio, CA 949461033100284
  48. Tapan Roy, M.D.Tustin, CA 927801205831922
  49. Monica Ryoo, MDLos Angeles, CA 900271124187729
  50. Janice Ryu, M.D.Sacramento, CA 958161710968474

Source: CMS NPPES, primary taxonomy 2085R0001X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 33 of 51 per resident

  1. Kentucky1.9
  2. Maine1.9
  3. Colorado1.9
  4. California1.9
  5. Nebraska1.9
  6. Tennessee1.9
  7. 50 states and D.C.2.1

Source: CMS NPPES, primary taxonomy 2085R0001X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

82.9% of these records appear in a Medicare file, against 82.3% nationally

A Medicare file here is Part D prescribing (2024), a MIPS score (2023), an Open Payments record (2024) or Medicare group billing (CMS Doctors and Clinicians). A record outside them may still see patients: these files cover Medicare only.

  1. California82.9%
  2. United States82.3%

Radiation Oncology Physician records in California, measured

  • In a Medicare file609 of 735 · 82.9% here, 82.3% nationally
  • In the CMS Doctors and Clinicians file545 · 74.1% here, 74.0% nationally
  • Not updated in five years or more406 · 55.2% here, 54.6% nationally
  • Median graduation year2005 · the 545 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 2085R0001X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

735 NPPES records list radiation oncology physician (2085R0001X) as their primary taxonomy with a practice address in California: 1.9 per 100,000 residents against 2.1 nationally (50 states and D.C.). Los Angeles has 98 of them (13%).

A record is a registration a provider made and keeps up to date: it shows neither that the provider is licensed nor that they still practice there. The state's own license search is the check.

States with a similar number

  1. Florida520
  2. New York449
  3. Texas449
  4. Pennsylvania383

States with a similar rate per 100,000

  1. Colorado1.9
  2. Nebraska1.9
  3. Tennessee1.9
  4. Delaware1.8

The largest states

  1. Florida520
  2. New York449
  3. Texas449
  4. Pennsylvania383
  5. Ohio298

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy; 2023 Census population estimates. A registry record is not a license.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.