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 333 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. Timothy WangFresno, CA 937011952763773
  2. Tzu Wang, MDEscondido, CA 920251912932187
  3. Wei Wang, MDMonterey Park, CA 917541184788523
  4. Wei Wang, MDIrvine, CA 926181750743969
  5. Wilhelm Wang, MDStockton, CA 952101093894784
  6. William Wang, M.D.Los Angeles, CA 900891518105022
  7. William Wang, D.O.Whittier, CA 906031508213646
  8. Xiao Yan Wang, M.D.Stanford, CA 943051134515638
  9. Xiaobo Wang, M.D.Livermore, CA 945511548551682
  10. Yanfeng Wang, M.D.Orange, CA 928681215126859
  11. Yanjun Wang, M.D.Mountain View, CA 940401033640800
  12. Yong Wang, MDEl Monte, CA 917311326056888
  13. Yu Wang, MDDuarte, CA 910101932170727
  14. Yuh-Huey Wang, MDDiamond Bar, CA 917651588639538
  15. Zhengran Wang, DORiverside, CA 925181205457355
  16. Felix WangmangWest Hollywood, CA 900481174264782
  17. Tenzing Wangyal, MDFountain Valley, CA 927081689675365
  18. James Wantuck, M.D.San Francisco, CA 941141821301110
  19. Momina Waqar, M.D.Santa Clara, CA 950511366853103
  20. Ravneet Waraich, MDSan Francisco, CA 941431285375352
  21. Uzma Waraich, M.D.Pomona, CA 917671528221843
  22. Carolyn WardNewport Beach, CA 926601730612177
  23. Carrie Ward, M.D.La Canada, CA 910111407116890
  24. David Ward, M.D.San Diego, CA 921031154347979
  25. James Ward, M.D.McClellan, CA 956521235127457
  26. Katherine Ward, MDStanford, CA 943051184644262
  27. Lindsey Ward, MDLos Angeles, CA 900951346878824
  28. Nicole Ward, DOMonterey Park, CA 917541366972564
  29. Richard Ward, MDSan Francisco, CA 941091407938731
  30. Carole Warde, MDLong Beach, CA 908061952443434
  31. Jonathan Warnelo, D.O.Garden Grove, CA 928431467980854
  32. Corey Warner, M.D.Hidden Valley Lake, CA 954671801998968
  33. David Warren, M.D.San Francisco, CA 941171811906852
  34. Jason Warren, M.D.Stanford, CA 943051114279080
  35. Kasper WarrickSan Diego, CA 921231679985071
  36. Terry Warsaw, M.D.Tehachapi, CA 935611497801062
  37. Mohiuddin Waseem, M.D.Galt, CA 956321669527594
  38. Rashad Wasef, M.D.Alhambra, CA 918011679506315
  39. Donna Washington, MD, MPHLos Angeles, CA 900731063592905
  40. Robert Washington, MDLos Angeles, CA 900261295702637
  41. Harris Wasser, MDSimi Valley, CA 930651609915768
  42. Sara Wasserbauer, M.D.Antioch, CA 945091174559074
  43. Emnet WassieFairfield, CA 945331942697966
  44. Andrew Wasson, MDOrange, CA 928681518660299
  45. Elijah Wasson, M.D.Burbank, CA 915051851322762
  46. Elizabeth Wasson, MDSaint Helena, CA 945741679755045
  47. Lisa Wastila, M.D.San Diego, CA 921031043375231
  48. Aileen Watanabe, MDSan Francisco, CA 941151912993627
  49. Jude Waterbury, MDElk Grove, CA 957581487626594
  50. James Waterhouse, M.D.San Leandro, CA 945771881772630

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.