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 336 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. Halyna West, M.D.Santee, CA 920711932437969
  2. Michael WestLos Angeles, CA 900891871242404
  3. Robyn Westlake, MDFolsom, CA 956301518045202
  4. Robert Weston, M.D.Carmichael, CA 956081407969231
  5. David Wetherhold, M.D.La Jolla, CA 920371346350766
  6. Richard Wexler, MDLos Alamitos, CA 907201679625362
  7. Stephen Weyers, M.D.Sacramento, CA 958141548402753
  8. Jacqueline Whang, MDSan Francisco, CA 941321154390821
  9. Janet Whang, M.D.Los Angeles, CA 900891639369002
  10. Nancy Wharfield, MDWoodland Hills, CA 913671588712301
  11. Gary Wheeler, M.D.Fort Irwin, CA 923101265490825
  12. Margaret Wheeler, MMDSan Francisco, CA 941201669587002
  13. Paul Wheeler, MDSan Ramon, CA 945831598755787
  14. Sarah Wheeler, MDSan Francisco, CA 941091154852572
  15. Spencer Wheeler, MDSan Diego, CA 921031427750611
  16. Aileen Whelan, M.D.Burlingame, CA 940101306955125
  17. Heather Whelan, M.D.San Francisco, CA 941431225185242
  18. Frederic Whinery, M.D.San Francisco, CA 941181144249202
  19. Cynthia Whitcher, MDDavis, CA 956161790844488
  20. Elena Whitcombe, MDDavis, CA 956161942300991
  21. Janet White, M.D.Beverly Hills, CA 902111699788828
  22. Joshua White, MDSacramento, CA 958171184202665
  23. Keith WhiteMartinez, CA 945531821217845
  24. Mary White, MDLos Angeles, CA 900731750392122
  25. Melinda White, DOCapitola, CA 950101154345056
  26. Michelle WhiteLos Angeles, CA 900951578260071
  27. Rachael White, M.D.Redwood City, CA 940631457537474
  28. Rachel White, M.D.Mission Hills, CA 913451285941559
  29. Ruth White, M.D.Woodland Hills, CA 913671497779821
  30. Megan Whitman, MDSacramento, CA 958161134363393
  31. James Whitmer, M.D.Berkeley, CA 947101962715920
  32. Cassandra Whitmore, MDFairfield, CA 945331447322243
  33. Jason Whitmore, MDFairfield, CA 945331881773653
  34. Michael Whitmore, D.O.Hesperia, CA 923451508307927
  35. Mary Whooley, MDSan Francisco, CA 941211629184890
  36. Philip Wichmann, MDAtascadero, CA 934221326000803
  37. Richard Wickenheiser, MDRed Bluff, CA 960801124153721
  38. Asela Wickremasinghe, M.D.Hanford, CA 932301164476081
  39. Palma Wideman, M.D.Meadow Vista, CA 957221346455995
  40. Rofina Widjaja, MDFontana, CA 923351851449870
  41. Jonathan Wiebe, M.D.Los Angeles, CA 900661588957849
  42. Robert Wiebe, M.D.Vallejo, CA 945921922049451
  43. Mark Wiederhold, M.D.San Diego, CA 921211598015745
  44. Joseph Michael Wiener, M.D.Beverly Hills, CA 902111952388845
  45. Katlin Wieselthier, DOColton, CA 923241922851450
  46. Patricia Wiggins, M.D.Sacramento, CA 958161124169784
  47. Scott Wigginton, MDSacramento, CA 958251548295769
  48. Sri Wijegoonaratna, M.DAnaheim, CA 928081457534984
  49. Kanishka Wijegunaratne, M.D.Encino, CA 914361669714754
  50. John Wikle, M.D.Irvine, CA 926041831138080

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.