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 60 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. Christopher Chow, MDNorthridge, CA 913251528024122
  2. Edward Chow, M.D.San Francisco, CA 941221881608826
  3. Jessica Chow, MDSan Francisco, CA 941181659959013
  4. Man Yin Chow, M.D.San Francisco, CA 941091518148683
  5. Marcus Chow, MDSan Jose, CA 951191215013727
  6. Nicole Chow, MDFountain Valley, CA 927081578069423
  7. Tak Chow, M.D.Barstow, CA 923111336150077
  8. Tiffany Chow, MDLos Angeles, CA 900891528718665
  9. Mei Chow-Kwan, MDWalnut Creek, CA 945981689619330
  10. Punam Chowdhury, MDEncinitas, CA 920241154513174
  11. Jennifer Choy, DORancho Cordova, CA 956701346328085
  12. Valerie Choy, MDSalinas, CA 939061528011822
  13. Warren Choy, MDSan Francisco, CA 941151336227982
  14. John Christensen, M.D.Oakland, CA 946051689646556
  15. Kate Christensen, MDPittsburg, CA 945651356427884
  16. Michael Christensen, MDOakland, CA 946111740572734
  17. Spencer Christensen, DORoseville, CA 956611679142954
  18. Thomas Christensen, M.D.Sacramento, CA 958331588945240
  19. William Christensen, MDCathedral City, CA 922341205920691
  20. Stephanie Christenson, MDOakland, CA 946111528234937
  21. Brittany Christian, MDTorrance, CA 905021487396883
  22. Katerina Christiansen, M.D.Sacramento, CA 958161699018499
  23. George Christides, M.D.Alhambra, CA 918031710946017
  24. Cristina Christopher, PACGlendora, CA 917411235378613
  25. Ilia Christy, M.D.San Diego, CA 921301043226889
  26. Daniel ChrobakSan Francisco, CA 941181053638106
  27. Andrzej Chruscinski, M.D., PH.D.Menlo Park, CA 940251346467065
  28. Steven Chrysafides, DOMoreno Valley, CA 925551457096190
  29. Alexandra Chrysanthis, MDLos Alamitos, CA 907201588734974
  30. Alan Chu, MD, MPHLos Angeles, CA 900951659766715
  31. Charlie Chu, MDAlameda, CA 945011154409936
  32. David Chu, DOVan Nuys, CA 914051326779273
  33. Emily Chu, MDStanford, CA 943051326797960
  34. Felipe Chu, MDLa, CA 900261588677173
  35. Grant Chu, M.D.Torrance, CA 905051376793901
  36. Jae Chu, M.D.Los Angeles, CA 900471063400745
  37. Janet Chu, M.D., M.P.H.San Francisco, CA 941431225482482
  38. Jason Chu, DOHarbor City, CA 907101619157260
  39. Julie Chu, M.D.San Diego, CA 921301174532410
  40. Kenneath Chu, MDHarbor City, CA 907101699823419
  41. Lily ChuSan Francisco, CA 941331700346475
  42. Patricia Chu, MDEncinitas, CA 920241659478329
  43. Paul Chu, M.D.Los Angeles, CA 900121619052628
  44. Stefanie Chu, MDNewark, CA 945601821207796
  45. Victor Chu, MDHayward, CA 945451134207988
  46. Wah Wah Chu, MDPalmdale, CA 935511891018719
  47. Weihan Chu, M.D.Stanford, CA 943051568738052
  48. William Chu, M.D.Palo Alto, CA 943011194875054
  49. Janice Loren Chua, MDTorrance, CA 905021801538749
  50. Amy Chuang, MDRedwood City, CA 940631952433740

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.