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 15 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. Kevin Aranguri, MDBaldwin Park, CA 917061538748223
  2. Siavash AraniLos Angeles, CA 900111629680905
  3. Richard Aranow, M.D.San Francisco, CA 941101841623139
  4. Anwar Arastu, MDLa Mirada, CA 906381760509749
  5. Vasuki AravagiriPalmdale, CA 935521174668842
  6. Manjari Aravamuthan, M.DSan Jose, CA 951161154410322
  7. David Araya, MDLos Angeles, CA 900481467649418
  8. Laura Arbogast, DOSan Francisco, CA 941041235209354
  9. David Arboleda, M.D.San Francisco, CA 941431497135222
  10. Haydee Arboleda, M.D.Burbank, CA 915061972575082
  11. Deborah Arce, M.D.Walnut Creek, CA 945971841215605
  12. Tyrone Arce, MDLake Elsinore, CA 925301205085800
  13. Mara Archambault, MDLa Verne, CA 917501023157021
  14. Julie Archer, M.D.Chico, CA 959261962409573
  15. Hannah Archibald, MDSan Francisco, CA 941151801356746
  16. Nena ArciagaRancho Cucamonga, CA 917301497594097
  17. John-Vincent Arcilla, M.D.Moreno Valley, CA 925551093100463
  18. Danielle Ardolino, MDLos Angeles, CA 900331225159635
  19. Andres Arellano, M.D.Oakdale, CA 953611306917430
  20. Francis Arenas, M.DBakersfield, CA 933011275717647
  21. Josefina Arenas, M.DFairfield, CA 945341518926484
  22. Ikechukwu Arene, M.D.Encino, CA 913161801806674
  23. Lorindha Argudo, MDDiamond Bar, CA 917651750477824
  24. Carlos ArguedasLos Alamitos, CA 907201023075579
  25. Wilma Arguelles-Gaviola, MDRedwood City, CA 940631740368398
  26. Mario Argueta Turcios, MDPorterville, CA 932571568183234
  27. Enoch Arhinful, MDLos Angeles, CA 900251821220930
  28. Jose Arias-VeraConcord, CA 945201497826283
  29. Robert ArieliLos Angeles, CA 900331245573708
  30. Muhammad ArifSacramento, CA 958161609496231
  31. Azzah Arikat, MDSantee, CA 920711184971640
  32. Claudine Armand, MDLos Angeles, CA 900251902909294
  33. Soroosh Armandi, D.O.Montebello, CA 906401427137439
  34. John Armato, MDRedondo Beach, CA 902771447263926
  35. Anna Armedilla, MDHarbor City, CA 907101720136732
  36. Christopher Armenia, MDTorrance, CA 905021700468063
  37. Amalia Armenta, MDGlendale, CA 912081902959240
  38. Helen Armstrong, MDSacramento, CA 958251972681682
  39. Jennifer Armstrong, MDHarbor City, CA 907101578567178
  40. Marsha Armstrong, MDLos Gatos, CA 950321417041765
  41. Elizabeth Arnold, MDSylmar, CA 913421538352554
  42. Jennifer Arnold, MDOakland, CA 946111942419502
  43. Keith Arnold, MDLakeport, CA 954531750561379
  44. Stanley Arnold, MDFountain Valley, CA 927081669403275
  45. Tyron Arnott, M.D.Citrus Heights, CA 956101639153513
  46. Dayna Arnstein Temby, M. D.San Diego, CA 921301497718324
  47. David Aron, MDHacienda Heights, CA 917451346319365
  48. Gary Aron, M.D.Redwood City, CA 940621619984911
  49. Jonathan Aron, M.D.Sacramento, CA 958171326232513
  50. Ryan AroninLos Angeles, CA 900951326486770

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.