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 139 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. Jason Jeffery, M.D.Sonora, CA 953701427293836
  2. Paul Jemelian, MDSan Mateo, CA 944011639190861
  3. Loza Jemjem, MDFresno, CA 937201740680867
  4. Taolin Jen, M.D.Rossmoor, CA 907201457384828
  5. Tiffany Jen, M.D.Rancho Mirage, CA 922701649689464
  6. Wencheng Jen, M.D.Arcadia, CA 910061811915481
  7. Robert JendersTorrance, CA 905021629006796
  8. Aaron Jeng, MD, MPHSan Gabriel, CA 917761003053851
  9. Kai Chin Jeng, MDLompoc, CA 934361588919971
  10. Paulette Jenison, MDSacramento, CA 958251609954379
  11. Christopher JenkinsLos Angeles, CA 900331790281525
  12. Rolland Jenkins, M.D.Long Beach, CA 908221164522140
  13. Scott Jenkins, MDNewport Beach, CA 926631528009743
  14. Dana Jennings, M.D.Ventura, CA 930031376644989
  15. Raymond Jennings, MDClearlake, CA 954221386659167
  16. Else Jensen, M.D.Berkeley, CA 947101790754885
  17. Georgina Jensen, MDFairfield, CA 945331891873634
  18. Sarah JensenLos Angeles, CA 900951740786870
  19. Trevor JensenSan Francisco, CA 941171043519382
  20. William Jensen, MDSan Jose, CA 951281306809025
  21. Jin Jeon, MDPanorama City, CA 914021528262656
  22. Won Jin Jeon, MDLoma Linda, CA 923541851911267
  23. Heesoo Jeong, M.D.Los Angeles, CA 900061174701429
  24. Jiyeon JeongLos Angeles, CA 900951386007375
  25. Kendrick Jeong, M.D.Mission Hills, CA 913451104991553
  26. Matthew Jeong, M.D.San Francisco, CA 941151558982512
  27. Terry Jerge, M.D.Los Angeles, CA 900171396717591
  28. Susan Jerian, M.D.Westlake Village, CA 913611457726440
  29. Parvez Jessani, MDIrvine, CA 926181134202849
  30. Carol Jessop, MDOakland, CA 946181336106848
  31. Tatum Jestila, MDBakersfield, CA 933061659878627
  32. Moon Jeu, M.D.McClellan, CA 956521710936638
  33. Benjamin Jeuk, M.D.Willits, CA 954901548882558
  34. Jerome Jew, M.D.San Francisco, CA 941081235143702
  35. Sarah Jewell, MDSan Francisco, CA 941101750468278
  36. Vasanthi Jeyakumar, MDLong Beach, CA 908151811994437
  37. Ruby Jhaj, M.D.Hesperia, CA 923451962841940
  38. Sejal Jhatakia, M.D.San Leandro, CA 945781871577312
  39. Soham Jhaveri, Do, DOFremont, CA 945381023196870
  40. Sonia Jhurani, M.D.Sacramento, CA 958111215279526
  41. Byung Ji, MDLos Angeles, CA 900951194302521
  42. Hyein Ji, MDLoma Linda, CA 923541275114423
  43. Joyce Ji, MDSan Diego, CA 921031659752822
  44. Wang Ji, M.D.Downey, CA 902401215253059
  45. Xiaolin Jia, MDStanford, CA 943051376962266
  46. Zhuo Jia, MDHarbor City, CA 907101710035639
  47. Dongmei Jiang, M.D., PH.D.Orange, CA 928681942350491
  48. Kenneth Jiang, MDHollister, CA 950231841279841
  49. Shasha Jiang, MDMonterey Park, CA 917541528599784
  50. Weizheng Jiang, MDModesto, CA 953501275023780

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.