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 201 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. Annie Mavian, DOSan Bernardino, CA 924041760685747
  2. Soe Maw, MDFolsom, CA 956301215984364
  3. Arlene-Clarita Maxino, MDSanta Clara, CA 950511629140421
  4. Kimberly Maxon, M.D.San Diego, CA 921031285810135
  5. Kenneth Maxwell, D.O.Loma Linda, CA 923541871514687
  6. Thomas Maxwell, M.D.San Marino, CA 911081598806655
  7. Cho May, M.DSimi Valley, CA 930651063805331
  8. Lawrence May, M.D.Tarzana, CA 913561487743787
  9. Louis May, MDRancho Mirage, CA 922701720497514
  10. Megan May, M.D.Salinas, CA 939011407155211
  11. Juan MayaThousand Oaks, CA 913601649813270
  12. Nossa Maya, M.D.El Cajon, CA 920201184825754
  13. Kenneth Maybury, M.D.San Francisco, CA 941171295733459
  14. Kathleen Mayer, MDBakersfield, CA 933091457488439
  15. Susan Mayer-Oakes, M.D.Montecito, CA 931081902916059
  16. Khadija Mayet, MDHuntington Beach, CA 926461528049665
  17. Gregory Maynard, M.D.San Diego, CA 921031265460331
  18. Michelle Maynard, MDRoseville, CA 956611194733063
  19. Adrian Mayo, M.D.Los Angeles, CA 900951215468939
  20. Susan Mayo, M.D.San Francisco, CA 941111386696185
  21. Patricia Mayorquin, M.D.Sacramento, CA 958171235429416
  22. Meiko Mayuzumi-Kuriya, M.D.Torrance, CA 905051053522318
  23. Michael Maywood, MDLa Jolla, CA 920371508916446
  24. Carlos Mazariegos Letran, M.D.Bakersfield, CA 933011477176899
  25. Aisha Maze, MDInglewood, CA 903011275952566
  26. Khalid MaznaviLos Alamitos, CA 907201548409030
  27. Peter Mazonson, MDSan Jose, CA 951111811953391
  28. Lindsay Mazotti, MDOakland, CA 946111720124613
  29. Michel Mazouz, M.D.Los Angeles, CA 900351679628036
  30. Amanda Mazza, M.D.Los Angeles, CA 900271396998753
  31. Albert Mazzie, M.D.Oakland, CA 946091457584799
  32. Scott Mc Kenzie, MDPanorama City, CA 914021477612042
  33. Nancy McAfee, M.D.San Francisco, CA 941041952404204
  34. Steven McAllen, M.D.Templeton, CA 934651821081043
  35. William McAllister, M.D.Corte Madera, CA 949251821072646
  36. Kevin McBride, M.D.Orange, CA 928681386924017
  37. Wesley McBride, M.D.Vallejo, CA 945891699971903
  38. Mark McCamish, MDVentura, CA 930031740020221
  39. Kelly McCann, M.D.Costa Mesa, CA 926271336155381
  40. Eileen McCann WangSylmar, CA 913421124345251
  41. Caitlin McCarthy, M.D.Santa Rosa, CA 954031083980304
  42. Sean McCarthy, M.D.Los Angeles, CA 900731609309400
  43. Steven McCarthy, M.D.Thousand Oaks, CA 913601497765309
  44. Marilyn McCartney, M.D.Oakland, CA 946051649490046
  45. Rejan McCaskill, M.D., F.A.C.P.Newport Beach, CA 926631790852606
  46. Brigid McCaw, MDRichmond, CA 948011245315902
  47. Eliza McCaw, M.D.San Francisco, CA 941151063740538
  48. Shana McClain, MDSan Francisco, CA 941091053940304
  49. Susan McClair, M.D.Goleta, CA 931171235278425
  50. Paige McCleary, MDPasadena, CA 911051891291464

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.