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 345 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. Jae Yang, MDSan Francisco, CA 941431487357539
  2. Jaeyoung Yang, MDRiverside, CA 925071508398900
  3. James Yang, M.D.Los Angeles, CA 900201467816744
  4. Janet Yang, M.D., M.P.H.Los Angeles, CA 900481174721807
  5. Janine Yang, MDStanford, CA 943051053069088
  6. Jenny Yang, MDLos Angeles, CA 900271407923246
  7. Jerry Yang, MDMartinez, CA 945531538247606
  8. Jianing Yang, DOOakland, CA 946021942935598
  9. Jingkun Yang, MDStanford, CA 943051780047829
  10. John Yang, M.D.Corona, CA 928821639569882
  11. Joo-Sock Yang, M.D.San Francisco, CA 941151134169188
  12. Kee Yang, M.D.Riverside, CA 925091952475626
  13. Laura Yang, M.D.South San Francisco, CA 940801437255502
  14. Lulu Yang, M.D.Orange, CA 928681770550246
  15. Mary Yang, M.D.Santa Clara, CA 950511881717791
  16. Nhia Yang, MDFremont, CA 945381740809912
  17. Paul Yang, MDLos Angeles, CA 900171477057495
  18. Qiuwei Yang, MDSan Francisco, CA 941091780334623
  19. Robert Yang, M.D.San Bernardino, CA 924081619043163
  20. Ronald Yang, MDWalnut Creek, CA 945981083792147
  21. Showshan Yang, MDTorrance, CA 905021770780637
  22. Susan Yang, MDSanta Clara, CA 950511770660615
  23. Wallace Yang, MDFresno, CA 937201518045335
  24. Xiao Yang, M.D.Pittsburg, CA 945651548220304
  25. Xinmiao Yang, MDIrvine, CA 926181750031019
  26. Irene Yang-Velez, M.D.Orange, CA 928681447489802
  27. Veronica Yank, MDPalo Alto, CA 943041447310248
  28. Max Yankes, MDVisalia, CA 932911982662250
  29. Patti Yanklowitz, MDPalo Alto, CA 943011912014705
  30. Elizabeth Yanni, M.D.Aliso Viejo, CA 926561780857003
  31. Tim Yanni, DOLaguna Hills, CA 926531487233003
  32. Shoji Yano, M.D.Los Angeles, CA 900331538256979
  33. David Yao, M.D.Palo Alto, CA 943041013009505
  34. Edmund Yao, M.D.Stockton, CA 952191245328004
  35. Jamie YaoSan Francisco, CA 941101912430760
  36. John Yao, MD FACPSan Francisco, CA 941071275169302
  37. Kevin Yao, MD MPHSan Gabriel, CA 917761588306625
  38. Mimi Yao, MDSan Diego, CA 921031528688785
  39. Pamela Yao, DOMontecito, CA 931081942837422
  40. Patrick Yao, MDLos Angeles, CA 900951235159377
  41. Stephanie Yao, MDRancho Mirage, CA 922701598758690
  42. Wan Yao, M.D.Monterey Park, CA 917541518951649
  43. Yu Yao, M.D.San Gabriel, CA 917761356307821
  44. Morgen Yao-Cohen, M.D.Oakland, CA 946051558658971
  45. Timothy Yaopruke, DOColton, CA 923241841759842
  46. Mei-Yoong Yap, MDBellflower, CA 907061962550921
  47. Woon Teck YapSan Francisco, CA 941431699166702
  48. Sinan YaqoobFresno, CA 937211154900561
  49. Aaliya Yaqub, M.D.Stanford, CA 943051407100522
  50. Corinne Yarbrough, M.D.San Diego, CA 921011013168483

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.