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 202 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. Brandon McClellan, MDSan Diego, CA 921231861807067
  2. Jane McClenahan, M.D.Atascadero, CA 934221679599377
  3. John McClintick, MDWoodland Hills, CA 913671720136542
  4. Dana McClintock, M.D.San Francisco, CA 941431871525360
  5. Michael McCloud, M.D.Sacramento, CA 958171841274420
  6. Thomas McCloy, MDLong Beach, CA 908131568476513
  7. Matthew McClure, M.D,South San Francisco, CA 940801235493404
  8. Scarlet McClure, MDVallejo, CA 945891033176979
  9. Caroline McCoach, MDSan Francisco, CA 941431225265333
  10. Douglas McConnaughey, MDNewport Beach, CA 926601104862721
  11. Sarah McCorkleRiverside, CA 925051710568076
  12. Margaret McCracken, MDSan Diego, CA 921031821048315
  13. Trevor McCracken, MDOrange, CA 928681841992195
  14. Denzel McCray, MDSan Francisco, CA 941431578265765
  15. Matthew McCullough, M.D.Valencia, CA 913551679839732
  16. Joseph McCune, MDSan Francisco, CA 941101285749614
  17. John Allen McCutchan, M.D.San Diego, CA 921031487679817
  18. Claire McCutcheon, MDOceanside, CA 920561689028060
  19. Roxanne McDaniel, MDWalnut Creek, CA 945961457439937
  20. Bernard McDermott, D.O.Oxnard, CA 930301821101841
  21. Margaret McDermott, MDSan Diego, CA 921031124604707
  22. Ellen McDonald, M.D.Pasadena, CA 911051679751408
  23. David McDonough, M.D.Tustin, CA 927801295866341
  24. Darren McDow, M.D.Los Angeles, CA 900451710905948
  25. F McDowell, MDMenlo Park, CA 940251154384576
  26. Nathan McFarland, M.DLakeside, CA 920401265462196
  27. Soyoung McFarland, M.D.San Diego, CA 921031902091242
  28. Delroy McFarlane, M.D.Santa Cruz, CA 950651619089588
  29. Robert McGarrigleSan Francisco, CA 941151053794834
  30. Jeffrey McGee, M.D.Roseville, CA 956611508870650
  31. Bryn Lee McGhee, M.D.Mather, CA 956551225371248
  32. Marilyn McGowan, MDSan Luis Obispo, CA 934011417586835
  33. Mark McGowan, MDSanta Monica, CA 904041720015902
  34. Diane McGrew, MDScotts Valley, CA 950661669452173
  35. Perlita McGuinnessCorcoran, CA 932121073712246
  36. William McGuinness, M.D.Corcoran, CA 932121881893667
  37. Thomas McGuire, M.D.San Jose, CA 951281801925151
  38. David McIntosh, M.D.Pacoima, CA 913311568463172
  39. Monica McKeever, MDNapa, CA 945581538135298
  40. Bernadette McKell, D.O.Half Moon Bay, CA 940191710185053
  41. Stephen McKenna, MDSan Jose, CA 951281396702239
  42. Ricardo McKenzie, M.D.Lynwood, CA 902621104823814
  43. Christopher McKinney, MDVentura, CA 930031699180539
  44. Lynette McLamb, M.D.San Rafael, CA 949011609946755
  45. Katherine McLane, MDOakland, CA 946111447270186
  46. Matthew McLaughlin, MDSacramento, CA 958251295885093
  47. Nathan McLaughlinSanta Monica, CA 904041528708518
  48. Catherine McLean, M.D.San Francisco, CA 941101902096027
  49. Ryan McMahan, MD, MASSan Francisco, CA 941151356978308
  50. Catherine McMillanSan Juan Capistrano, CA 926751114580222

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.