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 82 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. Karen Dubowy-Karpouzas, MDLong Beach, CA 908141710035597
  2. Matthew DudaLos Angeles, CA 900641992116735
  3. Vincent Duda, MDLaguna Niguel, CA 926771104883610
  4. Leslie Dudley, MDPasadena, CA 911011255303905
  5. Raymond Dudley, MDSan Francisco, CA 941431811947674
  6. Hilda DudumSan Francisco, CA 941101770676256
  7. Vijaya Dudyala, M.DSan Jose, CA 951281477522589
  8. Angelica Duenas, M.D.Marina Del Rey, CA 902921619982311
  9. Max Duesberg, MDStanford, CA 943051720776016
  10. Bryn Duffy, MDSan Rafael, CA 949031235243775
  11. Michael Duffy, DOSan Diego, CA 921011851399802
  12. Jason Dugan, MD, MBAIrvine, CA 926041750641874
  13. Priya Duggal, MDSan Francisco, CA 941211205215845
  14. Erica Duh, MDOrange, CA 928681295239382
  15. Philippe Duhaime, M.DSan Luis Obispo, CA 934051043692866
  16. Angelina Dukesherer, MDSanta Barbara, CA 931051295987899
  17. Matthew Dukewich, MD, PHARMDLos Angeles, CA 900331215480348
  18. Nadiya Dukhnych, MDMurrieta, CA 925621184202913
  19. Gabrielle Dukhovny, MDSan Diego, CA 921231619617420
  20. Amanpreet Dulai, MDMoreno Valley, CA 925571447516919
  21. Jacqueline Dulanto, MDMurrieta, CA 925631205567013
  22. Marylou Dulay, MDPanorama City, CA 914021467659326
  23. Maya Dulay, MDSan Francisco, CA 941211073719753
  24. Anthony Dulgeroff, M.D.Lancaster, CA 935341720199763
  25. Adriane DullCorona, CA 928821538665773
  26. Ronald Dulos, MDRiverside, CA 925071821063710
  27. Lucy Dumalag, M.D.Bakersfield, CA 933121083808547
  28. Frederick Dumas, M.D.Mendocino, CA 954601639268782
  29. Ovidiu Dumitrescu, MDSan Francisco, CA 941141245303106
  30. Teodora Dumitrescu, MDWalnut Creek, CA 945951366707523
  31. Dana Dumitru, D.O.Downey, CA 902421548407638
  32. Frank Dumont, MDSan Francisco, CA 941111629063136
  33. Andrew Dunatchik, M.D., PHARM.D.Stanford, CA 943051982976429
  34. Rain Dunaway, MDSan Francisco, CA 941151053817155
  35. Trevor DunbarColton, CA 923241659900785
  36. Bradford Duncan, MDPalo Alto, CA 943011104932540
  37. Naomi Duncan, M.D.Los Angeles, CA 900241760862544
  38. Ron Dunchok, MDSan Dimas, CA 917731356331730
  39. Neal Dunitz, M.D.Modesto, CA 953551245215870
  40. Steven Dunlap, MDRoseville, CA 956611093893786
  41. Christopher Dunn, M.D.Redwood City, CA 940621386724276
  42. David Dunn, M.D.Blythe, CA 922251477751709
  43. William Dunne, M.D.Los Angeles, CA 900271902076292
  44. Cheryl Dunnett, MDBeverly Hills, CA 902111043222623
  45. Eamonn Dunphy, MDSan Jose, CA 951281003878182
  46. Jill Dunton, MDSan Rafael, CA 949031588748552
  47. Calvin Duong, M.D.Colton, CA 923241184646119
  48. Christine Duong, MDCorona, CA 928791649299702
  49. Connie DuongLa Jolla, CA 920371619663887
  50. Han Duong, M.D.& D.O.Rosemead, CA 917701013070234

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.