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 49 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. Andrew Chang, MDWalnut Creek, CA 945961477632131
  2. Anita Chang, MDOakland, CA 946071013233535
  3. Ann Chang, MDFairfield, CA 945331952437527
  4. Anna Chang, M.D.Concord, CA 945201568402931
  5. Anne Chang, M.D.San Francisco, CA 941151356378111
  6. Arleen Chang, MDMountain View, CA 940411679650501
  7. Bayard Chang, M.D.Sacramento, CA 958251104816255
  8. Cameron Chang, M.D.Bakersfield, CA 933081659504330
  9. Carter Chang, MDRedwood City, CA 940631427136001
  10. Chih Yao Chang, MDSan Francisco, CA 941431730820739
  11. Christine Chang, M.D.Danville, CA 945061770696056
  12. Christopher Chang, M.D.Roseville, CA 956611467646943
  13. Daniel Chang, M.S., M.D.Colton, CA 923241568993665
  14. David Chang, M.D.San Diego, CA 921201073596342
  15. David Chang, M.D.Stanford, CA 943051639330806
  16. Dennis Chang, D.O.Glendale, CA 912041912360918
  17. Dorrie Chang, MDBeverly Hills, CA 902111114952470
  18. Edward Chang, MDMonterey Park, CA 917541780637199
  19. Elmer Chang, M.D.Union City, CA 945871710065578
  20. Emery Chang, MDLos Angeles, CA 900351649221383
  21. Emiley Chang, M.D.Torrance, CA 905021831328558
  22. Emily Chang, MDSanta Monica, CA 904041649858853
  23. Evelyn Chang, MDLos Angeles, CA 900731528195989
  24. Flora Chang, MDSacramento, CA 958171215317516
  25. Grace Chang, M.D.Irvine, CA 926141992877625
  26. Gwendolen Chang, M.D.San Leandro, CA 945781386807402
  27. Han Kyo Chang, M.DWalnut Creek, CA 945951235127150
  28. Helen Chang, MDMission Viejo, CA 926911639134687
  29. Helen Chang, M.D.Los Gatos, CA 950321427278688
  30. Henry Chang, D.O.West Covina, CA 917921740430289
  31. Henry Chang, MDCarmichael, CA 956081558471607
  32. Howard Chang, MDOakland, CA 946111700845336
  33. James Chang, M.D.San Francisco, CA 941091417068073
  34. Jason Chang, MBBSStanford, CA 943051457811853
  35. Jason Chang, MD, MSMilpitas, CA 950351104990704
  36. Jason Chang, M.D.Sacramento, CA 958161992787485
  37. Jeffrey Chang, DOWhittier, CA 906021568739233
  38. Jennifer Chang, M.D.Riverside, CA 925031831364991
  39. Jennifer Chang, MDSan Francisco, CA 941431598090441
  40. Jenny Chang, MDSacramento, CA 958251710065487
  41. John Chang, MDLos Angeles, CA 900951023043387
  42. Joyce Chang, M.D.Alhambra, CA 918011952357600
  43. Jyh Chang, M.D.Baldwin Park, CA 917061346259595
  44. Kenneth Chang, MDSan Francisco, CA 941331609832724
  45. Kevin Chang, M.D.Stanford, CA 943051740643600
  46. Kook Chang, M.D.Van Nuys, CA 914051356442354
  47. Kuo Hsien Chang, MDRowland Heights, CA 917481851392922
  48. Lawrence Chang, M.D.San Clemente, CA 926731528046430
  49. Li-Hon Chang, M.D.Sacramento, CA 958161154415750
  50. Lilian Chang, M.D.Irvine, CA 926181932120649

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.