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 7 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. David Potter, MDChico, CA 959261972560076
  2. Jessica Powers, M.D.Vacaville, CA 956871538361415
  3. Rajendra Prasad, M.D.Lakewood, CA 907121558585323
  4. Robert Quadro, M.D.Sacramento, CA 958161730293374
  5. David Quinn, M.D.Los Angeles, CA 900891043249584
  6. Miguel Quirch, MDLos Angeles, CA 900171336594175
  7. Kavitha Raj, MDPleasanton, CA 945881053450767
  8. Kavitha Ramchandran, MDStanford, CA 943051407091820
  9. Julia Ransohoff, MDStanford, CA 943051669975488
  10. Herbert Rappaport, MDLawndale, CA 902601407875123
  11. Karen Reckamp, MDDuarte, CA 910101649290248
  12. Manorama Reddy, M.D.San Diego, CA 921151356341168
  13. Sunil Reddy, M.D.Stanford, CA 943051578645057
  14. Haroon Rehman, MDCarmichael, CA 956081952784852
  15. Steven Reich, M.D.Del Mar, CA 920141396876330
  16. Amanda Reyes, M.D.Duarte, CA 910101871053462
  17. Thomas Reynolds, MDMontebello, CA 906401457398471
  18. Andrew Rezvani, MDStanford, CA 943051609983485
  19. Ina Rhee, MD PHDPalo Alto, CA 943041922099829
  20. Fauzia Riaz, MDStanford, CA 943051871859546
  21. Adam Rock, M.D.Duarte, CA 910101477907715
  22. Roberto Rodriguez, MDDuarte, CA 910101881793693
  23. Rajat Rohatgi, M.D.Stanford, CA 943051720253941
  24. Raymundo Romero, M.D.Glendale, CA 912061568537314
  25. Evanthia Roussos Torres, M.D.Los Angeles, CA 900891528327632
  26. James Rubenstein, MDSan Francisco, CA 941431972552784
  27. Martin Rubenstein, MDCampbell, CA 950081518928811
  28. Christy Russell, M.D.Los Angeles, CA 900891154350601
  29. Bradley SackfieldRedding, CA 960021851920409
  30. Natalie Sacks, M.D.San Francisco, CA 941101851590897
  31. Sarmad Sadeghi, MD, MS, PHDLos Angeles, CA 900891316104797
  32. Ahmed Sadiq, MDFremont, CA 945381700845229
  33. Ravi Salgia, MD,PHDDuarte, CA 910101417010927
  34. Jennifer Sanbar, M.D.Montrose, CA 910201912321407
  35. Randeep Sangha, M.D.Sacramento, CA 958171952582199
  36. Kamya SankarLos Angeles, CA 900481346602836
  37. Kamlesh Sankhala, M.D.Beverly Hills, CA 902121225214174
  38. Ranjan Sapra, M.D.Fountain Valley, CA 927081851582860
  39. Michael Saville, MDCarlsbad, CA 920081689928533
  40. Rishi Sawhney, M.D.Pleasanton, CA 945881881812519
  41. Kapil Saxena, M.D.San Francisco, CA 941431053775437
  42. Antoine Sayegh, M.D.Roseville, CA 956611225063696
  43. Steven Scates, MDCampbell, CA 950081871555755
  44. Lidia Schapira, MDStanford, CA 943051669463709
  45. Jonathan Schechter, MDEl Dorado Hills, CA 957621821367467
  46. Ethan Schram, M.D.Walnut Creek, CA 945981659320703
  47. Joseph Schroers-Martin, MDStanford, CA 943051831585389
  48. Jennifer Schutzman, MDSan Francisco, CA 941151285615948
  49. Victoria SeewaldtDuarte, CA 910101053495911
  50. Arpeet Shah, M.D.Castro Valley, CA 945461558780825

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.