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 170 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. Clinton Lane, M.D.Sonoma, CA 954761679564611
  2. Ingvild Lane, MDSacramento, CA 958161831171719
  3. Roger Lane, MDSolvang, CA 934631154424240
  4. Vikki Lane, M.D.San Diego, CA 921301508879537
  5. Shenghua LangRiverside, CA 925051518205020
  6. William Lang, M.D.Marina Del Rey, CA 902921366455842
  7. Michael Langberg, M.D.Los Angeles, CA 900481851427801
  8. Andria Langenberg, MDSan Francisco, CA 941101780607648
  9. Andrew Langfield, M.D.Oakland, CA 946021952835092
  10. David Langkammer, MDAntioch, CA 945311114005295
  11. Shadi Lanham, M.D.Roseville, CA 956611700244647
  12. Azadeh Lankarani-Fard, M.D.Los Angeles, CA 900731699871749
  13. Christian Lanot, M.D.Eastvale, CA 928801962664326
  14. Susanna Lansangan, M.D.Burbank, CA 915051780688036
  15. Hillary Lansman, D.O.Downey, CA 902421861830051
  16. Jaimie Lanzafame, M.D.Sacramento, CA 958171033615968
  17. Lilian Lao, M.D.Santa Rosa, CA 954041497059885
  18. Wilson Lao, MDUpland, CA 917861780603761
  19. Jessica Lapasia, M.D.San Francisco, CA 941151457538522
  20. Yu-Chi Lapid, MDBerkeley, CA 947051750904660
  21. Lawrence Lapsley, MDSanta Rosa, CA 954031114001187
  22. Cecil Laqui, M.D.San Bernardino, CA 924051043401375
  23. Fidel Lara, M.D.Sun Valley, CA 913521194909481
  24. Juan Larach, MDSan Francisco, CA 941151487732095
  25. Mythe Laramie, M.D.Fresno, CA 937201801907399
  26. Austin Larocca, MDLong Beach, CA 908221932804465
  27. James Larrick, MD PHDSunnyvale, CA 940891275960783
  28. Heidi Larsen, MDOakland, CA 946111275611055
  29. Jennifer Larsen, M.D.South San Francisco, CA 940801578839486
  30. Tyler LarsenLos Angeles, CA 900951568856763
  31. Catherine Larson, MDRiverside, CA 925061255313060
  32. Julia Larson, MDSan Diego, CA 921031639828593
  33. Robin Larson, MDPanorama City, CA 914021750440368
  34. Ingrid Larsson, M.D.Orinda, CA 945631114283322
  35. Jan LarssonEncino, CA 913161346399292
  36. Bhrett Lash, MDOakland, CA 946011568489383
  37. Jeffrey Lash, M.D.San Diego, CA 921231841370038
  38. Leanne LashRedwood Shores, CA 940681396744454
  39. Sahar Lashin, M.D.Lake Forest, CA 926301598053894
  40. Keith Lasko, MDDaly City, CA 940151225659907
  41. Richard Lasslo, MDVacaville, CA 956881467526780
  42. Francis Lastufka, MDLos Altos, CA 940221144312141
  43. Seetha Lath, MDArcadia, CA 910071821142993
  44. Nimitta Lathiya, DOYorba Linda, CA 928871770534935
  45. Ikramah LatifSan Diego, CA 921731407437650
  46. Wahid Latif, D.O.Los Angeles, CA 900271285898056
  47. Darin Latimore, MDSacramento, CA 958171407920713
  48. William Latson, MDFresno, CA 937201699353011
  49. John Lattin, MDLos Angeles, CA 900951649955170
  50. Alan Lau, M.D.Los Angeles, CA 900331396768446

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.