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 8 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. Amir Lavaf, M.D.Palm Springs, CA 922621508024852
  2. Lesley Lawrenson, M.D., PH.D.Lawndale, CA 902601457691503
  3. Quynh-Thu Le, M.D.Stanford, CA 943051316002116
  4. Eva Lean, M.D.Vista, CA 920811487648572
  5. Alan Lee, M.D.Los Angeles, CA 900951285072918
  6. Anita Lee, MDSanta Clara, CA 950511790773448
  7. Irwin Lee, MDRohnert Park, CA 949281861510760
  8. John Lee, MDSan Francisco, CA 941151316938657
  9. Minha Lee, MDLos Angeles, CA 900951356020689
  10. Percy Lee, M.D.Irvine, CA 926181447442504
  11. Sharon Lee, M.D.Santa Ana, CA 927051215105432
  12. Steve Lee, MDLos Angeles, CA 900951558395244
  13. Susan Lee, MDSacramento, CA 958191710983358
  14. Vincent Lee, M.D.Sacramento, CA 958231235148495
  15. Young Lee, M.D.Fullerton, CA 928351710986260
  16. Mark Leibenhaut, M.D.Sacramento, CA 958161932108263
  17. Melissa Lemieux, M.D.Sacramento, CA 958161710212113
  18. Michael Levine, MDConcord, CA 945201942291356
  19. Bernard Lewinsky, MDLos Angeles, CA 900151417930140
  20. Richard Li, MDWhittier, CA 906021174973739
  21. Xingzhe LiSan Jose, CA 951281780116509
  22. Winston Lien, MDLos Angeles, CA 900271255490991
  23. Andrew Lim, MD, BSCLos Angeles, CA 900891154933034
  24. Trevor Lim, M.D.Lancaster, CA 935341669546164
  25. Kevin Lin, M.D.Newport Beach, CA 926631548441454
  26. Ray Lin, M.D.La Jolla, CA 920371437110996
  27. Diane Ling, M.D.Los Angeles, CA 900891093100927
  28. Ted Ling, M.D., M.S.Palm Desert, CA 922111902121544
  29. Patrick Linson, M.D.Vista, CA 920811184618175
  30. David Linstadt, M.D.Sacramento, CA 958161265438964
  31. Jason Liu, MDSouth Pasadena, CA 910301619537511
  32. Li Liu, MDFresno, CA 937201619946753
  33. Siyuan Liu, MD, PHDSan Francisco, CA 941431316406317
  34. Yufei Liu, MD PHDDuarte, CA 910101023515947
  35. Shane Lloyd, M.D., PH.D.Newport Beach, CA 926631427443068
  36. Michael Lock, MDMission Viejo, CA 926911154357564
  37. Kenneth Lodin, MDLos Angeles, CA 900271306913314
  38. Mark Logsdon, M.D.Sacramento, CA 958161669479853
  39. John Loh, M.D.Laguna Woods, CA 926371114197472
  40. Harry Lomas, M.D.Chico, CA 959261942294202
  41. James Longo, MDTempleton, CA 934651083606602
  42. Billy Loo, MD, PHDStanford, CA 943051720167711
  43. Lilia Loredo, M.D.Loma Linda, CA 923541437183449
  44. William Lorentz, M.D.Los Angeles, CA 900731861657033
  45. Bailey Loving, MDSacramento, CA 958161366064958
  46. David Lowther, MDModesto, CA 953501902880818
  47. Sharon Lu, M.D.Los Angeles, CA 900271568721694
  48. Join Luh, M.D.Eureka, CA 955011093809634
  49. Asona Lui, MD, PHDSan Diego, CA 921031104487446
  50. Lauren Lukas, MDLos Angeles, CA 900891114150562

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.