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 111 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. Gevorg Grigoryan, MDGlendale, CA 912031366177933
  2. Kevin Grimes, MDStanford, CA 943051881759421
  3. William Grimm, DOPalm Springs, CA 922621407841315
  4. Joshua GrischkanSacramento, CA 958161518493071
  5. Yana Gristan, MDSanta Barbara, CA 931051023635562
  6. Jason Gritti, M.D.Sacramento, CA 958231619260809
  7. Jeanne Gromer, M.D.La Mesa, CA 919411659328169
  8. Robert Gromis, M.D.Los Angeles, CA 900251699981597
  9. Bennett Gross, M.D.San Diego, CA 921301952496473
  10. Cassandra Gross, MDStanford, CA 943051245818517
  11. Coleman GrossOakland, CA 946121538193388
  12. Jerry Gross, D.O.Marysville, CA 959011386647709
  13. Merik Gross, MDSan Francisco, CA 941431063562023
  14. Norman Gross, M.D.Seaside, CA 939551124065685
  15. Robert Gross, DOLake Isabella, CA 932401396827358
  16. Steven Gross, MDSan Diego, CA 921201790838134
  17. Susan Gross, MDPetaluma, CA 949541588714380
  18. Jeremy Grosser, M.D.Canoga Park, CA 913031235123373
  19. David Grossman, M.D.Tarzana, CA 913561700843117
  20. Leah Grossman, MDOxnard, CA 930301710542824
  21. Mark Grossman, MDLos Angeles, CA 900951457370736
  22. William Grossman, MDSan Francisco, CA 941431134178478
  23. Daniel Grosu, M.D.San Diego, CA 921221316145295
  24. George Groth, M.D.Rancho Santa Fe, CA 920671487759825
  25. Michelle Grotz-Rhone, MDBeverly Hills, CA 902121467597138
  26. Vanessa Grubbs, M.D.San Francisco, CA 941431477567717
  27. John Gruen, MDPanorama City, CA 914021619036365
  28. Thomas Gruhlke, M.D.Woodland Hills, CA 913671437132438
  29. William Grundler, M.D.Ventura, CA 930031750445201
  30. Michaela GruzenskyLoma Linda, CA 923541184035743
  31. Agnieszka Gryguc-SaxanoffSanta Monica, CA 904041588155287
  32. David Gu, D.O.Alhambra, CA 918011225107006
  33. Hong Gu, MDMountain View, CA 940411205908027
  34. Kelly Gu, MDSan Jose, CA 951191740920743
  35. Melinda Gu, M.D., PH DSan Francisco, CA 941181295901213
  36. Ron Gu, MDHacienda Heights, CA 917451851494215
  37. Wei Gu, M.D.Fresno, CA 937031760441919
  38. Wendy Gu, M.D.Hacienda Heights, CA 917451740579994
  39. Tricia Guadiz, MDLoma Linda, CA 923541346686375
  40. Jose Maria Guanzon, MDSan Jose, CA 951161134150881
  41. Teresita Guanzon, MDSan Jose, CA 951161306877055
  42. Rebecca Guarino, MDSan Jose, CA 951281790893667
  43. Sunitha Gubbala, M.D.San Jose, CA 951241992761118
  44. Matthew Gubens, MDStanford, CA 943051194923235
  45. Janhavi Gudal, M.D.San Jose, CA 951281669781282
  46. Vincent Guerena, M.D.Bakersfield, CA 933091295856409
  47. Elaina Guerin, D.O.Oakland, CA 946021720286446
  48. Jacqueline Guerra, M.D.Santa Barbara, CA 931111649685074
  49. Robert Guerra, M.D.Lompoc, CA 934361518988062
  50. Cesar Guerrero, M.D.Newport Beach, CA 926601023435757

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.