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 122 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. Oliver HentschelSacramento, CA 958171548655020
  2. Joline Heo, M.D.Brentwood, CA 945131083881858
  3. Gershon HepnerLos Angeles, CA 900051164549655
  4. Michael Her, M.D.Buena Park, CA 906201932156221
  5. John Herald, M.D.Los Angeles, CA 900481518378835
  6. Frances Herb, M.D.Berkeley, CA 947041861444945
  7. Lavinia Herbei, M.D.Walnut Creek, CA 945951508834946
  8. Alessandra Herbst De Cortina, MDLos Angeles, CA 900241023695749
  9. Sharon Herdan, M.D.Anaheim, CA 928081912217720
  10. Ana Herdocia, MDSanta Clara, CA 950511487731329
  11. Hector Heredia-Martinez, M.D.Chula Vista, CA 919101699882365
  12. Maria Herenyiova, MDSan Jose, CA 951191487730909
  13. Charles Hergesheimer, M.D.San Diego, CA 921031508892860
  14. William Heringer, MDSolvang, CA 934631528173127
  15. David Herman, MDLos Angeles, CA 900281205254331
  16. Mark Herman, MDSan Francisco, CA 941151588742183
  17. Michele Herman, M.D.Orinda, CA 945631588600753
  18. Samuel Herman, M.D.Aliso Viejo, CA 926561780063644
  19. Melody Hermel, MDLos Angeles, CA 900331699139139
  20. Diane Hermiz, DODowney, CA 902411962063925
  21. Benjamin Hernandez, M.D.San Jose, CA 951121922038587
  22. Bryan Hernandez, MDLos Angeles, CA 900341003365941
  23. Christina HernandezFresno, CA 937101386824043
  24. Daniel Hernandez, MDSan Diego, CA 921201104974070
  25. David Hernandez, MDReseda, CA 913351396756912
  26. Jacqueline HernandezHesperia, CA 923451871293779
  27. John Hernandez, MDMontebello, CA 906401073683546
  28. Jose Hernandez, M.DToluca Lake, CA 916021912202938
  29. Kenneth Hernandez, MDTorrance, CA 905021508475427
  30. Madeleine Hernandez, MDAtascadero, CA 934231346292174
  31. Mathew Hernandez, MDPalo Alto, CA 943011790892321
  32. Oscar Hernandez, M.D.Santa Monica, CA 904041699706952
  33. Rosa Hernandez, MDBeverly Hills, CA 902111235660721
  34. Rosemary Hernandez, MDOakland, CA 946111235217019
  35. Salvador Hernandez, MDSylmar, CA 913421598278202
  36. Sandra Hernandez, M.D.San Francisco, CA 941101396939823
  37. Valentin Hernandez, M.D.Hawthorne, CA 902501871520320
  38. Benjamin Hernandez Velasco, MDSanta Rosa, CA 954051720181282
  39. Israel Hernandez-Arce, MDCarson, CA 907451063690659
  40. David Hernandez-Rodriguez, MDPerris, CA 925701083664858
  41. Roy Herndon, M.D.Orange, CA 928681417928383
  42. Mary Herner, MDAlameda, CA 945011477884187
  43. John Hernried, M.D.Sacramento, CA 958161588742738
  44. Darien Heron, M.D.Scotts Valley, CA 950661821078726
  45. Stanley Herr, D.OBermuda Dunes, CA 922031841373743
  46. Faranak Herrera, D.O.Oakland, CA 946021386877892
  47. Gabriella Herrera, MD, MPHSan Francisco, CA 941101013594399
  48. Ralph Herrera, MDSacramento, CA 958231306924055
  49. Sulma Herrera, MD, MPHLos Angeles, CA 900121174944623
  50. Bernard Herring, M.D.Berkeley, CA 947021962529917

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.