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 83 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. Hong Duong, MDWestminster, CA 926831275561417
  2. Huong Duong, M.D.Tustin, CA 927801013020437
  3. John Duong, M.D.Long Beach, CA 908041356364889
  4. Jonathan Duong, M.D.Stanford, CA 943051083904536
  5. Khanh Duong, MDMontclair, CA 917631225528466
  6. Kien-An Duong, MDLaguna Woods, CA 926371033175658
  7. Kit Duong, MDModesto, CA 953501114984051
  8. Loc Duong, MDBurbank, CA 915051326494071
  9. Mai Duong, M.D.El Cajon, CA 920201629339304
  10. Man Duong, M.D.Calexico, CA 922311679718399
  11. Paul Duong, M.D.Westminster, CA 926831023181658
  12. Phillip Duong, D.O.Los Angeles, CA 900891407157621
  13. Tan Duong, MDSacramento, CA 958231174027395
  14. Tu Duong, D.O.Burbank, CA 915051336228584
  15. Tuan Duong, M.D.San Francisco, CA 941151245366558
  16. Tyler DuongLos Angeles, CA 900221487794277
  17. Katherine Dupas, DO, MSSan Diego, CA 921031376245332
  18. Prasanna Durairaj, D.OSouth San Francisco, CA 940801538459540
  19. Erin Duralde, MDBeverly Hills, CA 902121134613862
  20. Angeli Duran, MD, DOVacaville, CA 956881801144050
  21. Kara Durand, MDOakland, CA 946111932373339
  22. Antonio Durazo, M.D.Porterville, CA 932571427026145
  23. Belinda Dure-Smith, MDPoway, CA 920641487620662
  24. Paul Duron, M.D.Glendale, CA 912021811945082
  25. Danny Dursun, M.D.Mission Hills, CA 913451790005080
  26. Obidiugwu Duru, MDLos Angeles, CA 900951447276365
  27. Priyanka DuttaPalo Alto, CA 943011346829314
  28. Amrita Dutta-Choudhury, MDSanta Rosa, CA 954031104900182
  29. Jarod Duvall, MDLos Angeles, CA 900951275953911
  30. Virgil Duvernay, MD, PHD, FACPOroville, CA 959661285681056
  31. Beau Duwe, M.D.San Diego, CA 921031912012824
  32. Ryan Dwyer, MDTorrance, CA 905021801390893
  33. Catherine Dycaico, M.D.Davis, CA 956181578749396
  34. David Dycaico, MDDavis, CA 956161033297734
  35. Gladys Dychiao, MDSan Francisco, CA 941581407943392
  36. Karin Dydell, M.D.Oakland, CA 946091710094107
  37. Wendy Dyer, M.D.Cameron Park, CA 956821912077868
  38. Toby Dyner, M.D.San Francisco, CA 941141447357330
  39. Jeffrey Dyo, M.D.Costa Mesa, CA 926271538663158
  40. Timothy Dyster, MDSan Francisco, CA 941431083145692
  41. Sosi Dzhugarian, DOVentura, CA 930031124762265
  42. Virginia Dzul-ChurchSan Bruno, CA 940661588988083
  43. John Dzundza, M.D.San Francisco, CA 941431912223199
  44. Diane Eapen, MDFresno, CA 937011740984194
  45. Rene EapenLos Angeles, CA 900371275986127
  46. Karen Earle, MDSan Francisco, CA 941431801833678
  47. James Earley, D.O.San Diego, CA 921341902219462
  48. Mary Earp, MDSan Francisco, CA 941091851041511
  49. Jeffrey East, MDRichmond, CA 948011245380054
  50. Mamak Eatesam, M.D.Irvine, CA 926061407139314

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.