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 331 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. Alice Wallack, MDPismo Beach, CA 934491316957103
  2. Michael Wallack, M.D.San Fernando, CA 913401689791139
  3. Michael Walley, MDBakersfield, CA 933011073672630
  4. Anne Walling, MDLos Angeles, CA 900951568554939
  5. David Wallis, MDRedondo Beach, CA 902771255383139
  6. Ken Walls, PHD, MPAS, DORiverside, CA 925051992162242
  7. James Wallstrom, MDGlendale, CA 912081710927025
  8. Christopher Walsh, M.D.La Jolla, CA 920371053773200
  9. Judith Walsh, MDSan Francisco, CA 941151194779488
  10. Kevin Walsh, MDSacramento, CA 958251174601835
  11. Kristin Walsh, MDSan Jose, CA 951281801174941
  12. Shannon Walsh, D.O.San Diego, CA 921031558472779
  13. Kelly Walsma, MDLos Angeles, CA 900331215225321
  14. Richard Walter, M.D.Tarzana, CA 913561699731489
  15. John Walters, MDOxnard, CA 930301013907203
  16. Belinda Waltman, M.D.Los Angeles, CA 900891104115294
  17. Thomas Waltman, M.D.La Jolla, CA 920931720004575
  18. Anita Walton, MDSan Diego, CA 921111639150139
  19. Gilbert Walton, MDDuarte, CA 910101891738209
  20. Jean Waltuch, MDMenlo Park, CA 940251093770919
  21. Matthew Walvick, D.O.Walnut Creek, CA 945971114237732
  22. Maria Wamsley, M.D.San Francisco, CA 941431811927494
  23. Cecilia Wan, M.D.Burlingame, CA 940101780779108
  24. Chok Wan, M.D.Long Beach, CA 908061346346616
  25. Lori Wan, MDSan Diego, CA 921231861506495
  26. Michelle Wan, MDSylmar, CA 913421912657412
  27. Philip Wan, D.O.Santa Barbara, CA 930151235794009
  28. Qiu Hua Wan, D.O.Colton, CA 923241861794968
  29. Tammy Wan, M.D.Los Angeles, CA 900951205137981
  30. Xiao Wan, D.O.Lancaster, CA 935341851616775
  31. Florence Wandisan-Rosete, MDTracy, CA 953771457396897
  32. Ai-Jen Wang, M.D.Victorville, CA 923951326295288
  33. Albert Wang, M.D.Fremont, CA 945381649364837
  34. Allan Wang, M.D.Los Angeles, CA 900571114028404
  35. Amy Wang, M.D.Harbor City, CA 907101265662290
  36. Andrew Wang, M.D.San Diego, CA 921101558467787
  37. Andrew Wang, M.DSan Francisco, CA 941091164439675
  38. Ann Wang, MDRedlands, CA 923731346615374
  39. Annie Wang, MDLos Angeles, CA 900951003311572
  40. Baohua Wang, M.D.Los Angeles, CA 900261548305683
  41. Boyu Wang, D.O.Sacramento, CA 958161871904979
  42. Changlin Wang, M.D.Oakland, CA 946071861571572
  43. Charlene WangDowney, CA 902421174102735
  44. Cheng Wang, M.D.Redlands, CA 923731205859089
  45. Chia Ying Wang, MDSanta Ana, CA 927041275593170
  46. Christina Wang, MDSan Francisco, CA 941331427634393
  47. Christine Wang, M.D.San Diego, CA 921301003997024
  48. Clifford Wang, MDSan Jose, CA 951281972698769
  49. Congbin Wang, M.D.Pasadena, CA 911051952740946
  50. Corina Wang, MDOakland, CA 946111407093016

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.