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 123 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. Yasmin Herring, MDLos Alamitos, CA 907201275093833
  2. Sarah Herrman, MDSacramento, CA 958171346744190
  3. Matthew Herrmann, MDLos Angeles, CA 900661760918551
  4. John Herziger, MDSierra Madre, CA 910241518097914
  5. Rudolf Herzog, MDSan Diego, CA 921031861599466
  6. Mark Heslin, MDStanford, CA 943051457935355
  7. Diana Hess, MDCastro Valley, CA 945461295296275
  8. Brittany Hessell, DOBeverly Hills, CA 902111841876208
  9. Frances Hetherington, MDLos Angeles, CA 900271487019972
  10. Molly Heublein, MDSan Francisco, CA 941151720211279
  11. Jane Hewitt, MDFairfield, CA 945331629156526
  12. John Hewitt, M.D.Bakersfield, CA 933011396833265
  13. Arianna Heyer, MD, MPHSan Diego, CA 921211891371241
  14. James Heykes, MDRoseville, CA 956611003994799
  15. Leonie Heyworth, M.D.San Diego, CA 921611669528014
  16. Robert Hiatt, M.D.Berkeley, CA 947051679956932
  17. David Hibbert, MDSan Diego, CA 921031689200545
  18. Nicole Hickey, M.D.Walnut Creek, CA 945961831417120
  19. Kathleen Hicks, M.D.Oakland, CA 946021902850209
  20. Kimberly Hicks, M.D.Oakland, CA 946091972661254
  21. Rosalynd Hicks, M.D.Reseda, CA 913351629381926
  22. Stuart Hicks-Thompson, DOMoreno Valley, CA 925551891431276
  23. Misa Hidaka, M.DEl Cajon, CA 920201528085594
  24. Lauren Hidalgo, MDMilpitas, CA 950351952475253
  25. Tami Higa, MDLos Angeles, CA 900341053488999
  26. Nicole HigashiyamaLos Angeles, CA 900271609294024
  27. Mark Higgins, MDSan Francisco, CA 941141134193469
  28. Stephanie Higgins, M.D.Palo Alto, CA 943061336275031
  29. Michelle Higginson, MDSan Diego, CA 921031114955879
  30. Jane Hightower, M.D.San Francisco, CA 941151306981352
  31. Kamal Hijazi, MDMilpitas, CA 950351558448480
  32. Diana Hilbert, M.D.San Francisco, CA 941171386642551
  33. Robin Hilder, MBCHB MSCBeverly Hills, CA 902101972185320
  34. Daniel Hiles, MDChula Vista, CA 919111942648621
  35. Adrian HillSanta Barbara, CA 931051689369217
  36. Deanna Hill, MDSan Diego, CA 921031417194614
  37. James Hill, M.D.Los Angeles, CA 900671811131253
  38. Jessica Hill, M.D.La Mesa, CA 919421831271725
  39. Sabine Hill, D.O.Union City, CA 945871477631968
  40. Baker Hillawy, MDRiverside, CA 925011427408749
  41. Waheeda Hiller, MDWalnut Creek, CA 945981689642233
  42. Denise Hilliard, M.D.Danville, CA 945261053375188
  43. Linda Hillier, D.O.Pasadena, CA 911051407029192
  44. Joshua HillmanEncinitas, CA 920241710540083
  45. Wilbur Hillman, MDSan Francisco, CA 941091114695376
  46. Daniel Hilton, MDHuntington Beach, CA 926471093811358
  47. Stephen Hilty, M.D.San Luis Obispo, CA 934051205839818
  48. Edward Himes, MDIrvine, CA 926181942386503
  49. Cherie Hinchliffe, MDLaguna Beach, CA 926511619071867
  50. Russell Hines, M.D.Thousand Oaks, CA 913601548213101

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.