NPPES file of Aug 9, 2026

Medical Oncology Physician in California

447 NPPES records list medical oncology physician with a practice address in California, 1.1 per 100,000 residents, the 31st highest rate of 51. Stanford and San Francisco have the most; each record links to the provider's NPI and the California license search. Page 8 of 9.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RX0202X · method

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

Stanford has the most, 82

  1. Stanford82
  2. San Francisco53
  3. Duarte48
  4. Los Angeles39
  5. San Diego19

Medical Oncology Physician records in California

  1. Hely Shah, M.D.Ukiah, CA 954821912770660
  2. Sumit Shah, MDStanford, CA 943051942529227
  3. Shagufta Shaheen, M.DStanford, CA 943051659529089
  4. Anwer Shaikh, M.D.Vista, CA 920831609879170
  5. Sanjay Sharma, M.D.Fullerton, CA 928351174609358
  6. Vandana Sharma, M.D., PHD.Newark, CA 945601902837362
  7. Bryant Sheh, MDStanford, CA 943051801092242
  8. Casie Shenoy, M.D.Sacramento, CA 958171306135470
  9. Stephen Sherwin, M.D.San Francisco, CA 941101437461431
  10. Shruti Sheth, M.D., MSC.Menlo Park, CA 940251831283167
  11. Samer Shihabi, M.D.Sacramento, CA 958161730110768
  12. Aditya Shreenivas, MDDuarte, CA 910101215282264
  13. Anjali Sibley, MDStanford, CA 943051750580080
  14. Eduardo Siccion, MDLa Verne, CA 917501083701965
  15. Parminder Sidhu, MDMerced, CA 953401164663878
  16. John Siebel, M.D.San Mateo, CA 944021780741306
  17. Darren Sigal, MDLa Jolla, CA 920371417120080
  18. Stina Singel, MD,PHDStanford, CA 943051518141852
  19. Shiva SinghalMountain View, CA 940401942456389
  20. Mamatha Siricilla, M.B.B.SCameron Park, CA 956821487967576
  21. Evan Slater, M.D.Ventura, CA 930031992869044
  22. George Sledge, M.D.Stanford, CA 943051780640318
  23. Garrett Smith, M.D.San Francisco, CA 941331598750259
  24. Christina SniderSan Diego, CA 921031356960751
  25. Rosendo So-Rosillo, MDMountain View, CA 940401407889827
  26. Seung-Yil Song, M.D.San Diego, CA 921231578677860
  27. Allyson Spence, MD, PHDStanford, CA 943051023301074
  28. Darcy Spicer, M.D.Los Angeles, CA 900891568407179
  29. Thomas Spillane, MDSan Luis Obispo, CA 934011477558435
  30. Michael Spinner, M.D.Stanford, CA 943051639589567
  31. Sandhya Srinivas, MDStanford, CA 943051205913589
  32. Cy Stein, MDDuarte, CA 910101871673350
  33. Daphne Stewart, M.DLos Angeles, CA 900891598879918
  34. Frank Stockdale, MD., PH.D.Stanford, CA 943051962428649
  35. David Stolinsky, M.D.Los Angeles, CA 900691497171854
  36. Larry Strieff, M.D.Oakland, CA 946121073525564
  37. Vivek Subbiah, MDStanford, CA 943051174726384
  38. Fangdi Sun, MDStanford, CA 943051861996175
  39. Thomas Yang Sun, MDPleasanton, CA 945881215468160
  40. Brian Sworder, MDStanford, CA 943051528401734
  41. Niki Tank, MDPasadena, CA 911051629308515
  42. April Teitelbaum, MDSan Diego, CA 921301700065463
  43. Melinda Telli, MDStanford, CA 943051932135290
  44. Stefano Testa, MDStanford, CA 943051801424437
  45. Haluk Tezcan, MDStanford, CA 943051487684148
  46. Jacob ThomasLos Angeles, CA 900891811262967
  47. Alexander TongSan Diego, CA 921031356804926
  48. David Tran, MD PHDLos Angeles, CA 900331184747024
  49. Abhishek Tripathi, M.D.Duarte, CA 910101568750032
  50. Varsha Tulpule, M.D.Los Angeles, CA 900891801214903

Source: CMS NPPES, primary taxonomy 207RX0202X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 31 of 51 per resident

  1. Virginia1.2
  2. Kansas1.2
  3. Wisconsin1.2
  4. California1.1
  5. Indiana1.1
  6. Idaho1.1
  7. 50 states and D.C.1.7

Source: CMS NPPES, primary taxonomy 207RX0202X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

82.1% of these records appear in a Medicare file, against 81.8% 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. California82.1%
  2. United States81.8%

Medical Oncology Physician records in California, measured

  • In a Medicare file367 of 447 · 82.1% here, 81.8% nationally
  • In the CMS Doctors and Clinicians file313 · 70.0% here, 72.5% nationally
  • Not updated in five years or more184 · 41.2% here, 49.3% nationally
  • Median graduation year2004 · the 312 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RX0202X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

447 NPPES records list medical oncology physician (207RX0202X) as their primary taxonomy with a practice address in California: 1.1 per 100,000 residents against 1.7 nationally (50 states and D.C.). Stanford has 82 of them (18%).

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. Massachusetts421
  2. Texas547
  3. New York548
  4. Florida561

States with a similar rate per 100,000

  1. Indiana1.1
  2. Wisconsin1.2
  3. Idaho1.1
  4. Kansas1.2

The largest states

  1. Florida561
  2. New York548
  3. Texas547
  4. Massachusetts421
  5. Pennsylvania265

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.