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 127 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. Jenny HongHarbor City, CA 907101255913075
  2. Jin Hong, M.D.Alhambra, CA 918011972516441
  3. Johan Hong, MDSan Jose, CA 951281245867019
  4. Joungsen Hong, M.D.,F.A.C.G.Hemet, CA 925431588690333
  5. Kurt Hong, M.D.Los Angeles, CA 900331225056831
  6. Mary Hong, M.D.San Leandro, CA 945871861570624
  7. Sabrina Hong, MDSan Marino, CA 911081164750394
  8. Seogeun HongOrange, CA 928681871927962
  9. Lisa Hoo, MDSan Francisco, CA 941161487794053
  10. Rodney Hood, MDSan Diego, CA 921141033102959
  11. Sarah Hood, PA-CPlacentia, CA 928701831784693
  12. Eve Hood-Medland, M.D.Elk Grove, CA 957581598008443
  13. Andrew Hooker, MDSan Francisco, CA 941321922628114
  14. Sarah Hooks, MDLos Angeles, CA 900341497814131
  15. Armando Hool, M.D.Huntington Beach, CA 926491669583811
  16. Kalpana Hool, M.D.Torrance, CA 905031629043799
  17. Spencer Hoostal, MDSan Diego, CA 921031912528837
  18. Dorothea Hoover, MDMather, CA 956551609802800
  19. Jacob Hoover, M.D.Roseville, CA 956611932326956
  20. Kristen Hoover, M.D.Oakland, CA 946111962637306
  21. Philip Hopewell, MDSan Francisco, CA 941101659395853
  22. Richard Hopf, MDSanta Clara, CA 950511497829709
  23. Keith Hopkins, M.D.West Sacramento, CA 956911083778765
  24. Leah Hopkins, MDRiverside, CA 925061548239932
  25. Robert Hopkins, MD, MPH & TMNapa, CA 945591013224872
  26. Thomas Hopkins, MDRoseville, CA 956611720045206
  27. Susan Hopp-Midani, M.D.Long Beach, CA 908221407965205
  28. Allyson Hoppe, M.D.Newport Beach, CA 926631053548065
  29. Mita Hoppenfeld, MDStanford, CA 943051871941401
  30. Lalima Hoq, M.D.Beverly Hills, CA 902111811927791
  31. Sabina Hoque, M.D.Santa Rosa, CA 954031770776577
  32. Tasfia Hoque, D.O.Roseville, CA 956611356873301
  33. Rami Horani, MDWhittier, CA 906021225340227
  34. Tariq Horani, M.D.Mather, CA 956551275896284
  35. Mayer HorenstenCorcoran, CA 932121306045562
  36. Roya Hormozdiaran, MD,Irvine, CA 926061427245349
  37. John Hornberger, MD, MSMenlo Park, CA 940251801942909
  38. Lily Horng, MDStanford, CA 943051902065956
  39. Mark Horng, MDLos Angeles, CA 900731295739043
  40. James Horodyski, M.D.Fairfield, CA 945331184710063
  41. Robert Horowitz, MDSan Jose, CA 951111588628812
  42. Cheryl Horsley, MDTurlock, CA 953801912935586
  43. Heidi Horstman, MDSacramento, CA 958171033641253
  44. Claire Horton, MDOakland, CA 946011649374109
  45. Isaiah Horton, MDRedlands, CA 923731053803940
  46. Kenneth Horwitz, M.D.Anaheim, CA 928011225138829
  47. Marc HorwitzLos Angeles, CA 900951295154409
  48. Kalei Hosaka, MDSanta Monica, CA 904041124778329
  49. Poonam HosamaniStanford, CA 943051609018662
  50. John Hosoume, M.D.Sacramento, CA 958161588649354

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.