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 50 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. Lisa Chang, MDLos Angeles, CA 900481497496806
  2. Liteh Chang, MDMountain View, CA 940411255418190
  3. Mark Chang, MDSacramento, CA 958251164500815
  4. Marvin Chang, M.D.Torrance, CA 905051891138483
  5. Michael Chang, DOLos Angeles, CA 900271639751381
  6. Min-Shong Chang, MDHayward, CA 945451063479269
  7. Myo Chang, MDFairfield, CA 945351003899279
  8. Nancy Chang, M.D.Oceanside, CA 920561386635621
  9. Nancy Chang, MDWalnut Creek, CA 945981184702284
  10. Natalie Chang, D.O.Walnut Creek, CA 945961205018561
  11. Natalie Chang, M.D.Walnut Creek, CA 945971548370786
  12. Patricia Chang, M.D.Century City, CA 900671508886508
  13. Patrick Chang, MDMather, CA 956551861467656
  14. Paul Chang, M.D.Buena Park, CA 906211487627261
  15. Peter Chang, M.D.Los Angeles, CA 900391063563021
  16. Rachel Chang, MDLos Angeles, CA 900331891435939
  17. Rebekah Chang, MDVallejo, CA 945891518017326
  18. Ricky Chang, M.D.Santa Monica, CA 904041255699351
  19. Sang-Min ChangSelma, CA 936621043871916
  20. Simon Chang, DOSylmar, CA 913421144780230
  21. Sophia Chang, MDSan Francisco, CA 941101548375983
  22. Spencer Chang, MDStanford, CA 943051275160368
  23. Suzanne Chang, MDMurrieta, CA 925631780603852
  24. Suzanne Chang, MDWalnut Creek, CA 945951730373119
  25. Vincent ChangSan Jose, CA 951281255836334
  26. Wayne Chang, M.D.Milpitas, CA 950351942322987
  27. Wendy Chang, M.D.Los Angeles, CA 900271225255763
  28. Wesley Chang, M.D.Anaheim, CA 928071174593453
  29. Willis ChangFresno, CA 937201831496538
  30. Win Chang, M.D.Oakland, CA 946021780827196
  31. Yih Chang, M.D.Fremont, CA 945381174506380
  32. Yin Chu Chang, M.D.Anaheim, CA 928061487979043
  33. Grace Chang Broderick, M.D.Tustin, CA 927801548525264
  34. Michelle Chang-Cheng, MDDavis, CA 956181689746406
  35. Kathy Chang-Lipsenthal, MDMill Valley, CA 949411356340079
  36. Judy Chang-Witt, M.D.San Leandro, CA 945771225326564
  37. Harry Chao, MDCovina, CA 917231487613451
  38. Jonathan Chao, M.D.Palo Alto, CA 943011154611416
  39. Kathleen Chao, M.D.San Diego, CA 921341538130430
  40. Lawrence Chao, M.D.San Francisco, CA 941321700896370
  41. David Chapman, MDMartinez, CA 945531578548129
  42. Joan Chapman, D.O.Palmdale, CA 935511225329733
  43. Robert Chapnick, MDSan Jose, CA 951281710045646
  44. Sudha Chappidi, MDSacramento, CA 958231982782603
  45. Lily Chaput, MD,MPHSacramento, CA 958171790182020
  46. Stacy Charat, MDSan Diego, CA 921611750549457
  47. John Chardos, MDSan Diego, CA 921611235243718
  48. Kamini Chari, M.D.Covina, CA 917231265489280
  49. Roopa Chari, M.D.Santa Barbara, CA 931011962724013
  50. Cheryl Charles, M.D.Beverly Hills, CA 902111235141862

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.