NPPES file of Aug 9, 2026

Internal Medicine Physician in California

17,696 NPPES records list internal medicine physician with a practice address in California, 45 per 100,000 residents, the 17th 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 308 of 354.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207R00000X · 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, 1,423

  1. Los Angeles1,423
  2. San Francisco1,318
  3. San Diego961
  4. Sacramento601
  5. Oakland432

Internal Medicine Physician records in California

  1. Geetha Tamaroon, D.O.Oakland, CA 946021508002619
  2. Beatriz Tamayo, MDLos Angeles, CA 900171144396383
  3. Cyrus Tamboli, DOSan Francisco, CA 941431609404235
  4. James Florencio Tamesis, M.D.Roseville, CA 957471568819050
  5. Rania Tamimi, M.D.Alhambra, CA 918031285887430
  6. Jamshid Tamiry, M.D.Santa Ana, CA 927011457514374
  7. Jothika TamizharasuSacramento, CA 958171851977219
  8. Dheera Tamvada, MDModesto, CA 953501225552284
  9. Antonio Tan, M.D.Moreno Valley, CA 925531134277569
  10. Desmond Tan, M.D.Elk Grove, CA 957581780625863
  11. Dorothy Hui-Jia Tan, MDSan Francisco, CA 941091174101976
  12. Grace Tan, MDWest Hollywood, CA 900481295422616
  13. Hau Tan, M.D.La Mesa, CA 919421912907726
  14. Jennifer Tan, D.O.Downey, CA 902421205219706
  15. Joanna Tan, M.D.Long Beach, CA 908061053637959
  16. Julia Tan, MDVisalia, CA 932921174691679
  17. Kenneth Tan, MDGilroy, CA 950201396821815
  18. Khee Tan, M.D.San Gabriel, CA 917761881720092
  19. Kwan Tan, M.D.La Palma, CA 906231013099746
  20. Lionel TanSacramento, CA 958171548467871
  21. Patricia Tan, MDSacramento, CA 958251881766616
  22. Peter Tan, M.D.Arcadia, CA 910071144228909
  23. Qiuxue Tan, MDSanta Monica, CA 904041801388426
  24. Richard Tan, M.D.Vacaville, CA 956961053439547
  25. Sabrina Tan, M.D.Woodland, CA 957761962608539
  26. Shirley Tan, M.D.Loma Linda, CA 923571861503724
  27. Sing Tan, MDOakland, CA 946011447212048
  28. Steven Tan, MDLos Angeles, CA 900951891715033
  29. Terrence Tan, D.O.Colton, CA 923241851622435
  30. Tetris Ylizah Tan, MDHesperia, CA 923451104506005
  31. Tong TanEl Monte, CA 917311700998358
  32. Winnie Tan, MDSacramento, CA 958251790863462
  33. Xiaohui Tan, MDModesto, CA 953501841378650
  34. Zehui Tan, M.D.San Diego, CA 921271134230725
  35. Tomoko Tanabe, M.D.San Diego, CA 921611629083498
  36. Toshiyuki Tanaka, M.D.Torrance, CA 905031578526455
  37. Karl Tanara, M.D.Riverside, CA 925061033236237
  38. Sohrab Tanavoli, D.OLong Beach, CA 908221003039256
  39. Mary Ann Tancuan, MDPleasanton, CA 945881154409647
  40. Abhishek Tandon, MDFresno, CA 937201841300050
  41. Ashish Tandon, M.D.Roseville, CA 956611831296789
  42. Alex TangWest Hollywood, CA 900481083464663
  43. Alice Tang, MDSan Francisco, CA 941151518045111
  44. Amy Tang, M.D.San Francisco, CA 941331588009666
  45. Angela Tang, M.D.Torrance, CA 905051609884758
  46. Anne Tang, MDSan Francisco, CA 941151356429997
  47. Dan Tang, MDBellflower, CA 907061487721346
  48. Jennifer Tang, MDSanta Clarita, CA 913551346275831
  49. Jonathan TangSanta Clara, CA 950511396322335
  50. Josephine TangMountain View, CA 940401295821445

Source: CMS NPPES, primary taxonomy 207R00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 17 of 51 per resident

  1. New Jersey50
  2. New Hampshire48
  3. Minnesota46
  4. California45
  5. Florida45
  6. Ohio45
  7. 50 states and D.C.44

Source: CMS NPPES, primary taxonomy 207R00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

79.5% of these records appear in a Medicare file, against 78.7% 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. California79.5%
  2. United States78.7%

Internal Medicine Physician records in California, measured

  • In a Medicare file14,068 of 17,696 · 79.5% here, 78.7% nationally
  • In the CMS Doctors and Clinicians file11,077 · 62.6% here, 61.4% nationally
  • Not updated in five years or more10,832 · 61.2% here, 55.4% nationally
  • Median graduation year2004 · the 11,065 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207R00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

17,696 NPPES records list internal medicine physician (207R00000X) as their primary taxonomy with a practice address in California: 45 per 100,000 residents against 44 nationally (50 states and D.C.). Los Angeles has 1,423 of them (8%).

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. New York12,067
  2. Florida10,151
  3. Texas9,175
  4. Pennsylvania7,300

States with a similar rate per 100,000

  1. Minnesota45.9
  2. Ohio44.8
  3. New Hampshire48.0
  4. Maine42.8

The largest states

  1. New York12,067
  2. Florida10,151
  3. Texas9,175
  4. Pennsylvania7,300
  5. Illinois7,238

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.