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 291 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. Stephen Siegle, M.D.Torrance, CA 905031821055302
  2. Rodger Siemens, MDSacramento, CA 958231053499772
  3. Anna-Claire Siena, MDLos Angeles, CA 900731013594902
  4. Judi Sierra, MDSan Francisco, CA 944101629154778
  5. Melissa Siew, M.D.Westminster, CA 926831780096099
  6. Robert Siew, M.D.Pasadena, CA 911051578539516
  7. Teresa Sigala, M.D.Fresno, CA 937011487663233
  8. Surendra Sigdel, MDVisalia, CA 932911457089609
  9. Stephen Sigmund, MDTempleton, CA 934651700846607
  10. Eric Signoff, M.D.Sacramento, CA 958171154766392
  11. Gurpreet SihotaEl Cajon, CA 920201659715852
  12. Krixie Silangcruz, MD, MBACarson, CA 907451841857919
  13. Michael Silao, M.D.Los Angeles, CA 900261497706147
  14. Sylvain Silberstein, M.D.Van Nuys, CA 914051710038427
  15. Melody Sillo, MDYuba City, CA 959911063863983
  16. Anthony Silpanone, M.D.Anahiem, CA 928061700150539
  17. Adolfo Silva, MDFresno, CA 937201891731477
  18. Anthony Silva, MDStanford, CA 943051215631361
  19. Robert Silva, MDLos Gatos, CA 950321225129836
  20. Vasthi Silva, M.D.Los Angeles, CA 900331588687719
  21. Walter Silva, MDCorona, CA 928791174614994
  22. Carlos Silva Lynch, MDLos Angeles, CA 900481477132744
  23. Alan Silver, MDValencia, CA 913551649369125
  24. Andrew Silver, M.D.Los Angeles, CA 900481952604217
  25. Daniel Silver, M.D.Los Angeles, CA 900121770726572
  26. Larry Silverberg, MDNewport Beach, CA 926601730177635
  27. Emily SilvermanSan Francisco, CA 941111104261312
  28. Glenn Silverman, M.D.San Diego, CA 921271063480671
  29. Gregg Silverman, M.D.La Jolla, CA 920931952327009
  30. Stanley Silverman, M.D.Rancho Mirage, CA 922701467655035
  31. Steven Silverman, MDCosta Mesa, CA 926261740218551
  32. Luke Silverman-Lloyd, MD, MSSan Diego, CA 921031194411009
  33. Brent Silvers, M.D.Irvine, CA 926181568492122
  34. Richard Silverstein, MDPanorama City, CA 914021205907284
  35. Russell Silverstein, MDOakland, CA 946111912085713
  36. Victor Silvestre, MDOakland, CA 946111245318039
  37. Hannah Sim, MDBaldwin Park, CA 917061811036510
  38. Ida Sim, MDSan Francisco, CA 941431770547721
  39. John Sim, M.D.Santa Barbara, CA 931051497857510
  40. William Sim, MDDowney, CA 902411437256906
  41. William Sim, M.D.Cerritos, CA 907031902166531
  42. Amanuel Sima, M.D.Beverly Hills, CA 902111366493744
  43. Ion Sima, MDAnaheim, CA 928011598743932
  44. Homan Siman, MDWilmington, CA 907441558456814
  45. Veronika Simanek, M.D.Walnut Creek, CA 945981174556500
  46. Tatevik Simavorian, DOVentura, CA 930031104446889
  47. Noa Simchoni, M.D., PH.D.San Francisco, CA 941431881127868
  48. Christian SimeonAlameda, CA 945011528339892
  49. Francis Marlo Simeon, M.D.Bakersfield, CA 933011992369086
  50. Eric Simkin, MDHarbor City, CA 907101144389750

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.