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 78 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. Liz Diaz-Querol, MDOxnard, CA 930361184962565
  2. Sarah DibaccoSan Diego, CA 921341982299434
  3. Gary Dibble, MDFontana, CA 923351376602938
  4. George Dichter, M.D.Simi Valley, CA 930651841265261
  5. Alice Dick, M.D.Beverly Hills, CA 902111376555938
  6. Rio Dickens, M.D.San Diego, CA 921301033210984
  7. John Dickey, M.D.Bakersfield, CA 933011013203306
  8. Evgeniya Dickstein, MDAntioch, CA 945091629156732
  9. Swati Didonato, MDStanford, CA 943051730613969
  10. Paul Diehl, M.D.West Hills, CA 913071336215607
  11. Benjamin Diener, MDSanta Barbara, CA 931101588826697
  12. Brian Diep, DOLoma Linda, CA 923541821738147
  13. Claire Diep, M.D.Union City, CA 945871366508707
  14. Jimmy Diep, M.D.Long Beach, CA 908041912944216
  15. Kevin Diep, DOSan Diego, CA 921031083117865
  16. Susan Diethelm, MDRiverside, CA 925051023185857
  17. Brian Dietrich, MDStanford, CA 943051912263419
  18. Holly Dieu, M.D.Santa Monica, CA 904041184155285
  19. Anthony Dike, MDTorrance, CA 905021003858481
  20. Roopa Dillikar, M.D.Newport Beach, CA 926601932447893
  21. Maggie Dillione, DOSan Diego, CA 921341053945873
  22. Benedict Dillon, M.D.San Diego, CA 921541710142708
  23. Patrick Dimartini, MDPanorama City, CA 914021508914326
  24. Sadia Dimbil, MDSan Francisco, CA 941151902465404
  25. Luis Dimen, M.D.Pasadena, CA 911051609843564
  26. Albena Dimitrova, MDCrescent City, CA 955311861490674
  27. Susan Dindot, MDLaguna Niguel, CA 926771821279225
  28. Bindu DinduSan Diego, CA 921031740930544
  29. David Ding, MDPico Rivera, CA 906601144583758
  30. Feihong Ding, M.D.Mountain View, CA 940401487186128
  31. James Ding, MDTorrance, CA 905051285614636
  32. Julie Ding, DOStanford, CA 943051629607403
  33. Shulan Ding, MDFairfield, CA 945331811075351
  34. Sze Hoay Ding, M.D.San Marcos, CA 920781023239035
  35. Alex DinhSan Francisco, CA 941431336501030
  36. Hung Dinh, D.O.Downey, CA 902421386978914
  37. Jack Dinh, M.D.Murrieta, CA 925621356366876
  38. Jonathan Dinh, M.D.Murrieta, CA 925631710089081
  39. Long Dinh, MDBakersfield, CA 933011093863961
  40. Quynh Dinh, MDWoodland Hills, CA 913671760541387
  41. Son Quyen Dinh, MDSan Francisco, CA 941431104492321
  42. Saeed Dini, MDWoodland Hills, CA 913671194864892
  43. Venkata Naga Kiran Dintyala, MDLa Jolla, CA 920371255508123
  44. Dennis Diokno, M.D.San Francisco, CA 941151568693620
  45. Jesse Dion, M.D.Daly City, CA 940151619383734
  46. Laura Dipaolo, M.D.Burlingame, CA 940101326397936
  47. Michael Directo, M.D., M.B.A.Beverly Hills, CA 902111790027886
  48. Scott DitchBanning, CA 922201447787171
  49. Waldo Dittmar, M.D.San Francisco, CA 941091588050934
  50. Howard Dittrich, M.DSan Diego, CA 921031528099777

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.