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 292 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. Christopher Simmons, M.D.Lafayette, CA 945491083630081
  2. David Simon, MDAnaheim, CA 928051922089135
  3. Jeffrey Simon, MDHarbor City, CA 907101699842617
  4. Jin-Hwa Simon, M.D.Beverly Hills, CA 902121023204211
  5. Joel Simon, MDSan Francisco, CA 941211083636906
  6. Paul Simon, M.D.San Diego, CA 921081598970626
  7. Steven Simons, MDBeverly Hills, CA 902111346222486
  8. Ruby Simpkins, MDAgoura Hills, CA 913011770521312
  9. Laura SimplerSanta Monica, CA 904041194214171
  10. Gail Simpson, M.D.Ventura, CA 930031245260702
  11. Milica Simpson, M.D.Malibu, CA 902651053510834
  12. Russell Simpson, MDPasadena, CA 911061114998721
  13. Alison Sims, M.D.Newport Beach, CA 926601407981285
  14. Nicole Sims, D.O.Montclair, CA 917631932417417
  15. Mehran Sina, MDLos Angeles, CA 900341073672721
  16. Ramesh Sinaee, M.D.Sacramento, CA 958161417048448
  17. Robert Sinaiko, M.D.San Francisco, CA 941101205044831
  18. David Singer, MDLong Beach, CA 908131750303194
  19. Jonathan Singer, MDSan Francisco, CA 941431932122462
  20. Mark Singer, M.D.Napa, CA 945581962486332
  21. Abha Singh, M.B., B.S.La Jolla, CA 920931710144423
  22. Amandeep Singh, M.D.Fresno, CA 937211669729414
  23. Amanjung SinghSan Bernardino, CA 924111043890981
  24. Amisha Singh, MDSacramento, CA 958171154959567
  25. Anita SinghSacramento, CA 958171770014029
  26. Anpreet Singh, M.D.Davis, CA 956161932552437
  27. Atinderpal Singh, MDFresno, CA 937211609513589
  28. Baldeep Singh, MDStanford, CA 943051487674685
  29. Bhavdeep Singh, DOMoreno Valley, CA 925551922798388
  30. Bonnie Singh, M.D.Los Angeles, CA 900331902118656
  31. Charanbir Singh, MD, INCTurlock, CA 953821598921355
  32. Deepak Singh, M.D.Torrance, CA 905051023428851
  33. Deepinder Singh, M.DSanta Clara, CA 950511730227083
  34. Devindar Singh, M.D.Fremont, CA 945361447294624
  35. Dharminder Singh, M.D.Fremont, CA 945381215425855
  36. Ganeev Singh, MD, MBASan Diego, CA 921031891490769
  37. Geeta Singh, MDMilpitas, CA 950351487791703
  38. Gurinder Singh, D.O.Walnut Creek, CA 945951063827301
  39. Gurinder Singh, M.D.Yuba City, CA 959911790972701
  40. Gurpal Singh, MDBakersfield, CA 933061699351130
  41. Gurpreet SinghUnion City, CA 945871740714260
  42. Gurvinder Singh, MDWalnut Creek, CA 945961629711619
  43. Harjeet Singh, MDBakersfield, CA 933061003956863
  44. Harneet Singh, MDRiverside, CA 925051114094943
  45. Harpreet Singh, M.D.Stockton, CA 952091831331719
  46. Inderjit Singh, M.D.Patton, CA 923691417025388
  47. Indira Singh, MDLos Gatos, CA 950321194102632
  48. Jaya Singh, MDSacramento, CA 958161639589864
  49. Johnpaul Singh, MDLos Angeles, CA 900341982087847
  50. Kalbir Singh, MDFrench Camp, CA 952311568815066

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.