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 4 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. Thomas Holden, MDStanford, CA 943051679968218
  2. Lee Hong, MD, PHDIrvine, CA 926181144840646
  3. Robert Hsieh, MDStanford, CA 943051164714853
  4. Gerald Hsu, MDSan Francisco, CA 941431467501080
  5. James Hu, M.D.Los Angeles, CA 900481467424929
  6. Jane Huang, MDPalo Alto, CA 943041033296090
  7. Eric Humke, M.D., PH.D.Palo Alto, CA 943041881874519
  8. Laura Huppert, M.D.San Francisco, CA 941431568857456
  9. Syma Iqbal, M.D.Los Angeles, CA 900891518982206
  10. Haruka Itakura, M.D.Stanford, CA 943051669413449
  11. Siddharth Iyengar, MDSan Diego, CA 921031003376187
  12. Thierry Jahan, MDSan Francisco, CA 941151427007657
  13. Tanim Jain, MDSan Diego, CA 921031528695145
  14. Priya Jayachandran, MDLos Angeles, CA 900891962768671
  15. Fen Jiang, MDMission Viejo, CA 926911831312289
  16. Tyler Johnson, M.D.Stanford, CA 943051689945362
  17. Maximilian Julve, MDStanford, CA 943051659220671
  18. Masoom Kandahari, MD FACPTemecula, CA 925911467448100
  19. Hyunseok Kang, MDStanford, CA 943051316108509
  20. Irene Kang, M.D.Irvine, CA 926181336430727
  21. Lawrence Kaplan, MDSan Francisco, CA 941431437113586
  22. Pashtoon Kasi, MD, MSIrvine, CA 926181215167648
  23. Juraj Kavecansky, MDWalnut Creek, CA 945961942592563
  24. Sara Keck, MDSanta Rosa, CA 954031770743312
  25. Bridget KeenanSan Francisco, CA 941431497175798
  26. Nikhila Kethireddy, M.D.Duarte, CA 910101093249732
  27. Ali Khaki, MDStanford, CA 943051407299530
  28. Nawazish Khan, MDCerritos, CA 907031477753903
  29. Saad Munib Ahmed Khan, MDStanford, CA 943051083767024
  30. Michael Khodadoust, M.D./PH.D.Stanford, CA 943051548573215
  31. Do Young Kim, MBBSCerritos, CA 907031831695667
  32. Kevin Kim, M.D.San Francisco, CA 941151851485056
  33. Jay Klarnet, MDOxnard, CA 930301538258314
  34. Jeffrey Klein, M.D.Encino, CA 914361881743383
  35. Andrew Ko, MDSan Francisco, CA 941431851355853
  36. Marianna Koczywas, MDDuarte, CA 910101639286677
  37. Alan Kramer, MDSan Francisco, CA 941151356357347
  38. Priya Kumaravelu, MDSan Jose, CA 951241154514677
  39. Allison Kurian, M.D.Stanford, CA 943051144385758
  40. David Kurtz, MDStanford, CA 943051770875353
  41. Paula Kushlan, MDPalo Alto, CA 943011689783839
  42. George Labban, M.D.San Jose, CA 951241114925542
  43. Luko Laptalo, M.D.Carmichael, CA 956081114958501
  44. Sayeh Lavasani, MDOrange, CA 928681205130572
  45. Howard Lee, MDStanford, CA 943051891702312
  46. John Lee, M.D., PH.D.Stanford, CA 943051083908289
  47. Jonathan Lee, MDStanford, CA 943051083234074
  48. Mark Lee, MD, PHDPalo Alto, CA 943041881738003
  49. Matthew Lee, MDDuarte, CA 910101598296469
  50. Matthew Lee, D.O.San Mateo, CA 944021326589581

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.