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 48 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. Lee Tat Chan, M.D.San Francisco, CA 941181992728414
  2. Leon Chan, MDPanorama City, CA 914021578630380
  3. Lydia Chan, M.D.San Francisco, CA 941341578900452
  4. Mai-Sie Chan, MDSan Francisco, CA 941081326136557
  5. Matthew ChanSan Diego, CA 921031053060731
  6. Michael Chan, M.D.Los Angeles, CA 900331841442464
  7. Michelle Chan, M.D.San Gabriel, CA 917761043326283
  8. Milton Chan, D.O.Union City, CA 945871144309832
  9. Randall Chan, MDMonterey Park, CA 917541265969273
  10. Raymond Chan, M.D.San Jose, CA 951281174881726
  11. Robert Chan, MDAlhambra, CA 918011508826488
  12. Sarah Chan, MDSanta Monica, CA 904041033670815
  13. Sarah Chan, M.D.Sacramento, CA 958171083008510
  14. Shing Chan, MDOakland, CA 946111790961589
  15. Shirley Chan, MDSan Francisco, CA 941431497216196
  16. Shu Wing Chan, MDSan Francisco, CA 941081497828586
  17. Simon Chan, M.D.Grass Valley, CA 959451063431179
  18. Stephanie Chan, MDSan Jose, CA 951281639144538
  19. Stephen Chan, MDSan Francisco, CA 941151982109138
  20. Steve Chan, MDDiamond Bar, CA 917651790750743
  21. Steven Chan, MDSan Francisco, CA 941151659450781
  22. Thomas Chan, M.D.Sacramento, CA 958251255525309
  23. William Chan, MDWest Hollywood, CA 900481336836139
  24. Yuk Ching Cecily Chan, DOEncinitas, CA 920241730590696
  25. Therese Chan Tack, D.OSan Francisco, CA 941141750569950
  26. Leah Chan Uto, MDSan Jose, CA 951281164163481
  27. Anjali Chanana Gupta, M.D.Sacramento, CA 958251316042948
  28. Araceli Chanbonpin, M.D.San Gabriel, CA 917761962572909
  29. Lisa Chandler, MDBerkeley, CA 947051720376395
  30. Timothy Chandler, D.O.Lancaster, CA 935341740433622
  31. Aditi Chandra, M.D.Burlingame, CA 940101548566177
  32. Gowri Chandra, MDStanford, CA 943051528412640
  33. Mekhala ChandraSan Francisco, CA 941181518243203
  34. Neha Chandra, M.D.San Jose, CA 951281609012855
  35. Piyanka ChandraSan Jose, CA 951191679992986
  36. Satish Chandra, M.D.Santa Cruz, CA 950651659474542
  37. Shreya Chandra, MDSan Marcos, CA 920691972519825
  38. Smita Chandra, M.D.Walnut Creek, CA 945951811917826
  39. Canagaretnam Chandradas, M.D.Lancaster, CA 935361093840936
  40. Chitra Chandran, M.D.San Francisco, CA 941101487820866
  41. Mayuri Chandran, MDSan Francisco, CA 941101427511401
  42. Jayaram Chandrasekar, D.O.Loma Linda, CA 923501386986479
  43. Ramani Chandrasekaran, MDDelano, CA 932151013076207
  44. Kevin ChandrasenaWildomar, CA 925951144614447
  45. Jambur Chandrashekar, M.D.Indio, CA 922011013098557
  46. Christa Chandy, M.D.La Canada, CA 910111437340759
  47. Aeria Chang, M.D.Poway, CA 920641205996964
  48. Alan Chang, M.D.Escondido, CA 920251699784934
  49. Alexander Chang, M.D.San Francisco, CA 941091225356231
  50. Alicia Chang, M.D.Los Angeles, CA 900071811956774

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.