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 13 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. Gauravjit Singh, MDStockton, CA 952041154548626
  2. Robert Sinha, MDMountain View, CA 940401699767939
  3. Sumi Sinha, M.D.Dublin, CA 945681922531987
  4. Jerry Slater, M.D.Loma Linda, CA 923541245258458
  5. Melanie Smitt, MDStanford, CA 943051013171370
  6. Karen Sokolov, M.D.Burbank, CA 915051932439080
  7. Scott Soltys, MDStanford, CA 943051568500551
  8. Joseph Song, MDSouth San Francisco, CA 940801679537906
  9. Daljit Soni, M.DLynwood, CA 902621467659995
  10. Margaret Soper, MDLos Angeles, CA 900271386806180
  11. Radhika Sreeraman Kumar, M.D.Santa Clara, CA 950511265711394
  12. Leslie St. Royal, M.D.Burbank, CA 915041316044316
  13. Michael Steinberg, MDLos Angeles, CA 900951457355984
  14. Jonathan Stella, MDSan Luis Obispo, CA 934051790787141
  15. John Stevenson, M.D.Rancho Mirage, CA 922701306865050
  16. Erik Stickney, M.D.Chico, CA 959261619937984
  17. Christopher Straka, M.D.San Diego, CA 921031801281399
  18. Oscar Streeter, M.D.Santa Monica, CA 904031083764963
  19. Catherine Su, MDSan Jose, CA 951161184719668
  20. Wonsuk Suh, M.D., M.P.H.Santa Barbara, CA 931051023068541
  21. Jason Sun, M.D.Wildomar, CA 925951568691830
  22. Jeffrey Suplica, M.D.Sacramento, CA 958161245237692
  23. Matthew Susko, M.D.Oakland, CA 946111215399811
  24. Uma Swamy, MDFresno, CA 937201427377431
  25. Patrick Swift, M.D.Berkeley, CA 947041053312355
  26. Alam Syed, M.D.Long Beach, CA 908011316956279
  27. Khatija Syed, M.D.Los Angeles, CA 900591659380640
  28. Sean Szeja, M.D.Upland, CA 917861023351822
  29. Al Taira, MDSan Mateo, CA 944011346322567
  30. Lauren Tait, M.D.San Luis Obispo, CA 934051972821601
  31. Robert Takesuye, D.O.San Diego, CA 921341700089265
  32. Andrew Tam, MDArcadia, CA 910071548889298
  33. Bradley Tamler, M.D.Monterey, CA 939401740375575
  34. Nelly Tan, MDLos Angeles, CA 900951871756254
  35. Raymond Tan, MDFresno, CA 937201104809946
  36. May Tao, MDValencia, CA 913551144204249
  37. Kekoa Taparra, MD, PHDLos Angeles, CA 900951790304509
  38. David Tate, MDSaint Helena, CA 945741336123504
  39. Marcher Thompson, M.D.Bakersfield, CA 933011063832681
  40. Ronald Thompson, MDSanta Monica, CA 904041427033646
  41. John Thropay, M.D.Montebello, CA 906401427128073
  42. Kenneth Tokita, M.D.Irvine, CA 926181447432653
  43. Michael Tome, MDLos Angeles, CA 900271427125301
  44. Ernest Torigoe, MDGreenbrae, CA 949041720060700
  45. Artour Torossian, M.D.Palmdale, CA 935511851656953
  46. Yonina Tova, M.D.San Diego, CA 921011558369017
  47. Nicholas Trakul, MD, PHDStanford, CA 943051639332687
  48. Loan Tran, MDPleasant Hill, CA 945231043292410
  49. Kathryn Tringale, MDSan Diego, CA 921031780172031
  50. Prabhakar Tripuraneni, M.D.San Diego, CA 921211558312868

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.