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 335 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. Jonathan Weiner, M.D.Beverly Hills, CA 902111659383891
  2. Melvin Weinert, MDOakland, CA 946111508944380
  3. Jorge Weingarten, MDMonterey Park, CA 917551174966618
  4. Scott WeingartenLos Angeles, CA 900241508073958
  5. Michael Weingert, MDSan Francisco, CA 941141982385191
  6. Leah Weinstein, M.D.San Jose, CA 951281053773283
  7. Richard Weinstein, M.D.Walnut Creek, CA 945961972522407
  8. Stacey Weinstein, M.D.Los Angeles, CA 900951508141359
  9. Sheri Weiser, M.D.San Francisco, CA 941101043420367
  10. David Weiss, M.D.Torrance, CA 905051609958289
  11. Dean Weiss, M.D.Encino, CA 914361750746269
  12. Michael Weiss, MDWalnut Creek, CA 945961023196185
  13. Richard Weiss, MDFolsom, CA 956301346520897
  14. Sheldon Weiss, MDSanta Rosa, CA 954051699862920
  15. Stephen Weiss, MDPetaluma, CA 949541265516330
  16. Jeffrey Weissman, M.D.San Diego, CA 921031619130994
  17. Joy Weissman, MDPasadena, CA 911051982678819
  18. Seth Weissman, MDMenlo Park, CA 940251518921253
  19. William Weissman, MDVista, CA 920841730114992
  20. Phyllis Weldon, M.D.Novato, CA 949471528203320
  21. Laurence Wellikson, M.D.Dana Point, CA 926291770858649
  22. Faith Wells, MDSouth San Francisco, CA 940801194818211
  23. Leslie Wells, M.D.San Diego, CA 921031780777433
  24. Lindsay WellsSanta Monica, CA 904041225292055
  25. Kristin Welter, MDMountain View, CA 940401609982925
  26. Mary WelterSan Francisco, CA 941431902463979
  27. Stephen Welter, M.D.San Rafael, CA 949031801906136
  28. Matthew Welzenbach, MDLos Angeles, CA 900071386006088
  29. Jefferson WenSan Carlos, CA 940701851825087
  30. Jessica Wen, PHD, MDSan Diego, CA 921031457937922
  31. Li Wen, M.D.Long Beach, CA 908221508959503
  32. Marissa Wen, MDLathrop, CA 953301467999169
  33. Daniel Wenberg, MDTurlock, CA 953821376585893
  34. Basil Wendel, MDSan Diego, CA 921031710737317
  35. Josh Weng, M.D.Arcadia, CA 910071043219678
  36. Modern Weng, D.O.Mountain View, CA 940431407888944
  37. Victor Weng, D.O.Downey, CA 902411972624435
  38. Mildred Wenger, M.D.Los Angeles, CA 900281376554162
  39. Neil Wenger, MDLos Angeles, CA 900951720009301
  40. Spencer Wenger, MDHawthorne, CA 902501649271040
  41. Yasmeen Wengrow, MDFremont, CA 945381063597730
  42. Donald Wentzel, MDLaguna Beach, CA 926511417217522
  43. Melvyn Werbach, M.D.Tarzana, CA 913561124391412
  44. David Werdegar, MDSan Francisco, CA 941181821100082
  45. Ayoda Werede, MDSan Francisco, CA 941431881257251
  46. Dena Werner, M.D.Ventura, CA 930031669758918
  47. Leonard Werner, M.D.Loma Linda, CA 923541386724748
  48. Alex Wessel, MDWest Hollywood, CA 900481598452849
  49. Mildred Wessigk, MDSan Diego, CA 921611922101153
  50. Carol West, M.D.Berkeley, CA 947041467721902

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.