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 43 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. Rena Callahan, M.D.Valencia, CA 913551487856779
  2. Carla Callao, MDSan Francisco, CA 941151275611808
  3. Jerry Callaway, MDSan Jose, CA 951241780788356
  4. Jacques Calma, MDAlameda, CA 945011366507444
  5. Roxana Calmac, M.D.Auburn, CA 956021306866900
  6. Maritza Calonga, MDLong Beach, CA 908221881996528
  7. Jeaniesar Caluag, M.D.San Francisco, CA 941171720246705
  8. Victor Caluya, MDBuena Park, CA 906201467457101
  9. Elisabeth Calvelli, M.D., M.A.Santa Clara, CA 950511255525366
  10. Aida Calvillo, MDGreenbrae, CA 949041225031727
  11. Linda Calvillo King, MDLos Angeles, CA 900331740481639
  12. Matthew CalzettaSalinas, CA 939061619268257
  13. Mariam Camacho, MD, PHDLa Jolla, CA 920371457937898
  14. Richard Camacho, MDStockton, CA 952041649253881
  15. Armando Camacho-Santos, MDLoma Linda, CA 923541700453933
  16. Randell Camantigue, MDSanta Clara, CA 950511962580449
  17. Jose Camaro, M.D.Emeryville, CA 946081679532808
  18. Claire Camaya, M.D.Oakland, CA 946051508210592
  19. Sheri Cameron, MDChula Vista, CA 919131568859411
  20. David Campa, M.D.Valencia, CA 913551639170228
  21. Olivia Campa, M.D.Sacramento, CA 958171275882359
  22. Edward Campagna, M.D.Yorba Linda, CA 928861598991895
  23. Barbara Campbell, M.D.Mountain View, CA 940401679597405
  24. Grant Campbell, MDRoseville, CA 957471861074510
  25. Hillary Campbell, MDSacramento, CA 958251578641254
  26. Matthew Campbell, M.D.Brentwood, CA 945641023108016
  27. Ronelle Campbell, D.O.San Diego, CA 921031720013527
  28. S Campbell, MDSonoma, CA 954761053427989
  29. Stuart Campbell, M.D.Grass Valley, CA 959451306842588
  30. Susan Campbell, M.D.San Jose, CA 951251437284775
  31. Amanda Camposagrado, M.D.Folsom, CA 956301780669945
  32. Elizabeth CanalesSylmar, CA 913421780116525
  33. Jeffrey Canceko, M.D.Los Angeles, CA 900331033394929
  34. Brian Candell, M.D.Orinda, CA 945631164581575
  35. Carolina Candotti, MDSacramento, CA 958171386703130
  36. Radha CanepaSacramento, CA 958171760767511
  37. Oliver Caniga, M.D.Bakersfield, CA 933091659472934
  38. Enelyn Canio, MDStockton, CA 952101508934936
  39. Timoteo Canio, MDLivermore, CA 945511164594974
  40. Douglas Canlas, M.D.Roseville, CA 956611871721654
  41. Kim David Canlas, M.D.Roseville, CA 956611982920401
  42. Maria Cecilia Canlas, MDCarson, CA 907451558362905
  43. Robert Cann, M.D.Pasadena, CA 911061205939659
  44. Rachel Canning, MDOakland, CA 946111386657609
  45. Gregory Cannon, M.D.Monterey, CA 939401568844637
  46. Kendell Cannon, M.D.Stanford, CA 943051194016600
  47. Vanessa Canonigo, D.O.San Diego, CA 921201588077861
  48. G. Anthony Cantelmi, MDRoseville, CA 956611366594178
  49. David Cao, DOLong Beach, CA 908061013246867
  50. Louie Cao, MDWest Hollywood, CA 900481306425525

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.