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 314 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. Michael Tierney, M.D.Los Gatos, CA 950321104872415
  2. Nhu-Cynthia Tieu, D.O.Harbor City, CA 907101225195415
  3. Joshua Tiger, DOPalm Springs, CA 922621386077139
  4. Claire Tilem, MDPasadena, CA 911011710951645
  5. Kimberly Tilley, MDLos Angeles, CA 900331740338763
  6. Monica TillySan Francisco, CA 941101043577315
  7. Ronald Tilsen, M.D.Newport Beach, CA 926601801852280
  8. Hemali Tilva, MDStanford, CA 943051881221190
  9. Leslie Tim, MDEmeryville, CA 946081811956618
  10. Htun TinEl Monte, CA 917311588776132
  11. Sansan Tin, MDSan Francisco, CA 941221396779450
  12. Alvin Ting, MDRedwood City, CA 940631043398696
  13. Randolph Tingle, DOOrange, CA 928681326508854
  14. Whittemore Tingley, M.D.San Francisco, CA 941431902918329
  15. Jennifer Tinloy, DOSan Leandro, CA 945771609196187
  16. Calvin Tint, MDFountain Valley, CA 927081265413751
  17. Htay Tint, MDModesto, CA 953551396168167
  18. Nyein Tint, M.D.Rancho Cucamonga, CA 917301336533447
  19. Jill Tiongco, MDCarmel, CA 939231861442196
  20. Vincent TirGilroy, CA 950201942886312
  21. Mehrafarid Tiraie, MDChula Vista, CA 919101437611456
  22. Gregory Tirdel, MDTruckee, CA 961611821080144
  23. Conny Tirtaman-Sie, M.DLoma Linda, CA 923571043306947
  24. Oltita Tirzaman, M.D.Ventura, CA 930031093743791
  25. Maria Tiscareno, MDSan Jose, CA 951281780640524
  26. Rebecca Tisdale, M.D.Stanford, CA 943051346602844
  27. Heather Tiska, MDSacramento, CA 958251629156104
  28. Robert Titcher, MDSylmar, CA 913421083704902
  29. Vladimir Titov, MD PHDSan Leandro, CA 945781982666905
  30. Mindy Tittiger, M.D.Pasadena, CA 911051023350501
  31. Robin Tittle, MDSan Francisco, CA 941431255657425
  32. Griselda Tiu, MDNational City, CA 919501619088440
  33. Barkha Tiwana, MDSacramento, CA 958171013538982
  34. Jasbir Tiwana, M.DSimi Valley, CA 930651689826661
  35. Jasleen Tiwana, M.D.Long Beach, CA 908221356683494
  36. Jaspreet Tiwana, M.D.Sacramento, CA 958231871725895
  37. Neeraj Tiwari, MDAntioch, CA 945311629156112
  38. Vijay Tiwari, M.D.San Leandro, CA 945771790935948
  39. Kaushik Tiwary, M.D.Fresno, CA 937211144584434
  40. Fe Tjoa, M.D.Long Beach, CA 908221366541807
  41. Seon Tjoe, M.D.Dublin, CA 945681346565942
  42. Charis Tjoeng, DOTorrance, CA 905021740818715
  43. Nour Tlimat, MDSan Jose, CA 951161972033785
  44. Eulia Tlisov, DOLong Beach, CA 908131528564853
  45. Bryan To, M.D.Murrieta, CA 925621407948474
  46. Christina ToVan Nuys, CA 914051124336789
  47. Dat To, MDMoreno Valley, CA 925551194924233
  48. Dong To, M.D.Los Angeles, CA 900331215369459
  49. Duc To, MDMoreno Valley, CA 925551629205216
  50. Jacqueline To, M.D.Menlo Park, CA 940271215461645

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.