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 178 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. Jaclyn Leong, DOIrvine, CA 926171225564727
  2. Jasmine Leong, M.D.Corona, CA 928811083627798
  3. Krystal LeongOakland, CA 946111689949760
  4. Sally Leong, MDSylmar, CA 913421801478532
  5. Stanley LeongEl Monte, CA 917311043322936
  6. Dmitry Leongardt, M.D.Chico, CA 959261174549554
  7. Sean Leoni, M.D.Calabasas, CA 913021669544052
  8. Conrad Leonik, MD, MPHSan Francisco, CA 941171356194286
  9. Michael Lepera, DMD MDLos Angeles, CA 900571205008588
  10. Alfred Lerner, MDMountain View, CA 940411447337399
  11. Elisabeth Lernhardt, MDPenn Valley, CA 959461902879885
  12. Lawrence Lerno, MDLong Beach, CA 908221851470983
  13. Ivan Leroux, MDUpland, CA 917861568088110
  14. Elsa Lerro, M.D.Fresno, CA 937201366496770
  15. Daniel Lesky, MDSan Francisco, CA 941091851745160
  16. Fahimeh Lessani, M.D.San Diego, CA 921301326144148
  17. Tonia Lessani, MDBurlingame, CA 940101356337075
  18. Howard Lesser, M.D.San Diego, CA 921231528101870
  19. Scott Letendre, M.D.San Diego, CA 921031588696660
  20. Kwai-Yin Leu, D.O.Santa Clara, CA 950511336261312
  21. Richard Leuchter, MDLos Angeles, CA 900951851895122
  22. Alan Leung, MDSan Francisco, CA 941151245222330
  23. Alex Leung, M.DFullerton, CA 928351669414512
  24. Allison Leung, M.D.Los Angeles, CA 900491407148224
  25. Alvina Leung, M.D.Long Beach, CA 908221780782755
  26. Derek Leung, M.D.Fontana, CA 923351336560481
  27. Eric Leung, M.D.Los Angeles, CA 900271194021683
  28. Eric LeungSan Francisco, CA 941181538745559
  29. Florence Leung, MDOakhurst, CA 936441396817110
  30. Hobart Leung, M.D.Santa Monica, CA 904041487932372
  31. Jacquelyn Leung, MDAnaheim, CA 928071356499388
  32. Joseph Leung, MDSan Francisco, CA 941151154409787
  33. Kenneth Leung, MDTorrance, CA 905051255080040
  34. Linda Leung, MDRedwood City, CA 940631235217894
  35. Lucinda Leung, MD, PHD, MPHLos Angeles, CA 900731336438308
  36. Margaret Leung, M.D.Roseville, CA 956611215124938
  37. Peggy Leung, M.D.San Francisco, CA 941431548688518
  38. Tiffany Leung, MDStanford, CA 943051679739957
  39. Verna Leung, MDLos Angeles, CA 900271770654741
  40. Rebecca Levasseur, MDSan Diego, CA 921201992853873
  41. Barbara Lever, MDFountain Valley, CA 927081083611230
  42. Douglas Levey, M.D.La Mesa, CA 919421932210523
  43. Amit LeviLos Angeles, CA 900951225491590
  44. Amy Levin, MDPalo Alto, CA 943011396852653
  45. David Levin, MDWoodland Hills, CA 913671598824161
  46. Edward Levin, M.D.Saratoga, CA 950701851660708
  47. Marina Levin, M.D.Sherman Oaks, CA 914031700128451
  48. Mordechai Levin, MDSherman Oaks, CA 914031699303701
  49. Neil Levin, M.D.Santa Rosa, CA 954031285633081
  50. Sara Levin, MDMartinez, CA 945531184707853

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.