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 349 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. Lucia Young, D.O.Anaheim, CA 928041518227917
  2. Maile Young, MDSan Diego, CA 921031093904997
  3. Margo Young, M.D.San Bernardino, CA 924041851555700
  4. Peter Young, M.D.Los Angeles, CA 900951043743461
  5. Richard Young, MDSacramento, CA 958171871949255
  6. Roger Young, MDDavis, CA 956161952480683
  7. Roy Young, MDCathedral City, CA 922341679593859
  8. Shaun Young, MDSan Francisco, CA 941181285959171
  9. Steven Young, M.D.Santa Barbara, CA 931051679510630
  10. Susan Young, MDSan Francisco, CA 941151558433300
  11. Vicky Young, MDSan Francisco, CA 941161700926821
  12. Katy Young-Lee, MDEmeryville, CA 946081841259173
  13. Valerie Youngblood, MDDel Mar, CA 920141538397815
  14. Samy Younis, M.D.Irvine, CA 926061922115203
  15. Keyvan Yousefi, M..D.Beverly Hills, CA 902101679650386
  16. Abdollah YousefzadehLos Angeles, CA 900631144617481
  17. Ashraf Youssef, M.D.Wasco, CA 932801366650608
  18. Moudy Youssef, M.D.Yreka, CA 960971881743409
  19. Aram Youssoufian, MDMission Hills, CA 913451346214327
  20. Shalra YousufiThousand Oaks, CA 913601922341387
  21. Aaron Yu, DOCitrus Heights, CA 956211831686575
  22. Albert Yu, MDOakland, CA 946111760560544
  23. Alexander Yu, MDRedwood City, CA 940631144554098
  24. Alice Yu, D.O., M.P.H.Long Beach, CA 908221205218906
  25. Amy Yu, MDPalo Alto, CA 943011720570328
  26. Annie Yu, M.D.Sacramento, CA 958171255454757
  27. Brian Yu, MDThousand Oaks, CA 913601861856361
  28. Christine Yu, MDLos Angeles, CA 900951801195060
  29. Chung Yao Yu, MDSacramento, CA 958161265886436
  30. David Yu, MDLos Angeles, CA 900951407877061
  31. Eddy Yu, MDSan Juan Capistrano, CA 926751245212588
  32. Felicia Yu, MDSylmar, CA 913421710277884
  33. Francis Yu, MDSan Francisco, CA 941151255419875
  34. Gregory Yu, M.D.La Canada Flintridge, CA 910111598944613
  35. Hans Yu, D.O.San Francisco, CA 941221811089303
  36. Hwei Ju Yu, MDLos Angeles, CA 900271770642373
  37. Jeanette Yu, MDOakland, CA 946111457330839
  38. Justin Yu, M.D.Burlingame, CA 940101053707802
  39. Katherine Yu, MDSylmar, CA 913421700990033
  40. Katherine Yu, DO, MPHOakland, CA 946021265568513
  41. Kevin Yu, MDLos Angeles, CA 900331225618473
  42. Lawrence Yu, M.D.Santa Monica, CA 904041316171481
  43. Lena Yu, MDLos Angeles, CA 900271871641605
  44. Li YuSan Francisco, CA 941171326344425
  45. Melissa Yu, MDHarbor City, CA 907101255532131
  46. Micah YuNewport Beach, CA 926601699153189
  47. Michelle Yu, M.D., PH.D.San Francisco, CA 941221518252576
  48. Mingwei Yu, MDStanford, CA 943051366903999
  49. Minho Yu, D.O.Moreno Valley, CA 925551871700278
  50. Pearl Yu, MDSan Diego, CA 921031225079981

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.