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 44 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. Mara Cao, MDSan Francisco, CA 941101154966091
  2. Vance Cao, M.D.Newport Beach, CA 926631952450553
  3. David Capaccio, DOSanta Rosa, CA 954051457355364
  4. Lisa Capaldini, MDSan Francisco, CA 941141841249240
  5. Amanda Caparso, D.O.Poway, CA 920641003046004
  6. Andrea Louise Capcap, MDSacramento, CA 958171538745443
  7. Carleo Capili, M.D.Modesto, CA 953501235558198
  8. Maria Lyzandra Capili, M.D.Modesto, CA 953501053730911
  9. Richard Caplin, M.D.San Francisco, CA 941151568443455
  10. Stephen Capon, MDSan Diego, CA 921201538217492
  11. Benjamin Capper, M.D.Newbury Park, CA 913201437544699
  12. Matthew Cappiello, MDLos Angeles, CA 900331922402577
  13. Colleen Caprio, M.D.Salinas, CA 939011558723684
  14. Elma Cara, MDStockton, CA 952101205914017
  15. Thomas Caradonna, M.D.San Jose, CA 951191790027944
  16. Estelita Carandang, M.D.San Jose, CA 951181255473757
  17. Andreh Carapiet, M.D.Glendale, CA 912031649520909
  18. Oscar Carazas, MDOxnard, CA 930301255745956
  19. Shannon Marie Carbajal, M.D.Moreno Valley, CA 925551598129587
  20. Francisco Carbon, MDBurbank, CA 915061770504508
  21. Ginearosa Carbone, MDSanta Barbara, CA 931051891432548
  22. Armyn Anne Carbonell, M.D.Fresno, CA 937201689681140
  23. Carrie Cardenas, M.D.San Diego, CA 921031750390084
  24. Hector Cardenas, M.D.San Diego, CA 921031649383647
  25. Sylvia Cardounell, MDSan Jose, CA 951281366902207
  26. Kathryn CardozaLaguna Beach, CA 926511518427749
  27. Edson CariasSanta Monica, CA 904041538559257
  28. Marilyn Carlin, M.D.San Diego, CA 921301124123088
  29. David Carlisle, MDLos Angeles, CA 900951619902566
  30. Jesus Carlos, M.D.Los Angeles, CA 900151609954155
  31. Brendt Carlson, MDWatsonville, CA 950761609916063
  32. Deborah Carlson, M.D.Ventura, CA 930031942231121
  33. Gary Carlson, MDNewport Beach, CA 926631497700116
  34. Grace Carlson, MDBerkeley, CA 947051558514109
  35. Jeffrey Carlson, D.O.Chico, CA 959261750642849
  36. Kimberley Carlson, MDMountain View, CA 940401699877019
  37. Steven Carlson, MDMountain View, CA 940401902813496
  38. Kemia Carlyle, D.O.,M.P.H.Los Angeles, CA 900431891806097
  39. Teresa Caron, MDSan Rafael, CA 949031366526345
  40. Lauren Carpenter, MDPalo Alto, CA 943041528647674
  41. Ward Carpenter, MDLos Angeles, CA 900281811068901
  42. Harry Carr, M.D.Santa Rosa, CA 954031770694044
  43. John Carr, M.D.Palm Desert, CA 922601336178649
  44. Pannell Carr, M.D.San Diego, CA 921091427138643
  45. Arthur Carrasco, M.D.Downey, CA 902411588601595
  46. Douglas Carrasco, M.D.Temecula, CA 925921861406340
  47. William Carrasco, MDSacramento, CA 958251740368281
  48. Marytere Carrasquillo Navarro, MDChico, CA 959261851751408
  49. Adrian Carreon, M.D.Atwater, CA 953011679598536
  50. Gloria Carreon, M.D.Riverside, CA 925061194937649

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.