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 190 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. Lawrence Luppi, M.D.Laguna Hills, CA 926531952356727
  2. Katherine Lupton, MDSan Francisco, CA 941101336277847
  3. Hector Luque, D.O.Los Angeles, CA 900331558474395
  4. Louis Lurie, M.D.Bakersfield, CA 933061275875312
  5. David Lush, M.D.San Diego, CA 921301801823893
  6. Paul Lussier, D.O.Santa Maria, CA 934581013949791
  7. Rhonda Luster, MDLong Beach, CA 908061255338406
  8. Elijah Lustig, DOOakland, CA 946021518511443
  9. Kevin Lutley, MDStanford, CA 943051194221036
  10. Doan Luu, M.D.Fremont, CA 945381447443270
  11. Richard Luu, MDMilpitas, CA 950351316024250
  12. Tri Luu, M.DLoma Linda, CA 923541396056610
  13. Tuan Luu, MDFresno, CA 937031619001351
  14. Vinh Luu, M.D.Elk Grove, CA 957581174936116
  15. Myo Lwin, MDRoseville, CA 956611588838080
  16. Swe LwinChowchilla, CA 936101982007084
  17. Alex Ly, M.D.Fullerton, CA 928351134380173
  18. Alexandra LyTorrance, CA 905021134583016
  19. Eddie Ly, M.D.Fountain Valley, CA 927081134650922
  20. Sopheap Ly, MDVista, CA 920831780732578
  21. Stacie Ly, MDCarlsbad, CA 920081114028669
  22. Stacy Ly, M.D.Concord, CA 945201649458795
  23. Tiffany Ly, M.D.Menlo Park, CA 940251235428038
  24. Tri Ly, MDHemet, CA 925431356923957
  25. Trung Ly, MDWestminster, CA 926831669567541
  26. Joel Lym, MDFremont, CA 945381033294798
  27. Kyaw Lyn, MDWest Covina, CA 917901902841166
  28. Christopher Lynch, M.D.Torrance, CA 905021134506371
  29. Kimberly Lynch, MDLos Angeles, CA 900731427581040
  30. Michael Lynch, M.D.Fresno, CA 937201679612436
  31. Robert Lynch, M.D.Riverbank, CA 953671184644031
  32. Scott Lynch, M.D.Oakland, CA 946021437591377
  33. Philip Lynn, M.D.Garden Grove, CA 928431326044819
  34. David Lyon, DOAnaheim, CA 928071619025434
  35. David Lyon, M.DModesto, CA 953511538229638
  36. Howard Lyon, MDSan Diego, CA 921031164459764
  37. Jesse Lyon, M.D.La Mesa, CA 919421124393210
  38. Cozzette Lyons, MDLos Angeles, CA 900021366471757
  39. Marjan Lyons, M.D.Thousand Oaks, CA 913601548603517
  40. Morgan Lyons, D.O.Oxnard, CA 930361578790135
  41. Albert MaSanta Clara, CA 950511881071470
  42. Ayemyint Ma, MDPleasanton, CA 945881649322868
  43. Daveena Ma, MDOakland, CA 946071629034368
  44. Eric Ma, MDPanorama City, CA 914021467500421
  45. George Ma, M.D.Los Angeles, CA 900121528178332
  46. Iris MaStanford, CA 943051598055766
  47. Irvin Ma, MDSanta Clara, CA 950541487233201
  48. Jackson Ma, M.D.Montebello, CA 906401447298732
  49. Jada Ma, M.D.Cerritos, CA 907031568440618
  50. Janet Ma, M.D.Santa Monica, CA 904041164698098

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.