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 63 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. Hebert Claude, D.OTorrance, CA 905031215213871
  2. Moises Claudio-HenriquezHawthorne, CA 902501679300321
  3. Stephanie Clavijo, MDSan Francisco, CA 941101316524796
  4. Darby Clayson, MDSan Francisco, CA 941221619968021
  5. David Clayton, MDLa Jolla, CA 920371902037476
  6. Dorothea Clayton, M.D.Oxnard, CA 930301053596395
  7. Michael Clearfield, D.O.Vallejo, CA 945901689638561
  8. Derrick Cleland, DO, MPHLoma Linda, CA 923541720614712
  9. Lisa Clement, M.D.Solvang, CA 934631952486094
  10. Michael Clement, MDOakland, CA 946111225116007
  11. Robert Clements, MDBaldwin Park, CA 917061326119207
  12. David Clemons, MDWalnut Creek, CA 945971831683044
  13. Kathy Clewell, M.D.Poway, CA 920641326100835
  14. James Clifford, M.D.Imperial Beach, CA 919321619034030
  15. Jessica Clima, MDWalnut Creek, CA 945971932425105
  16. Anne Climaco, M.D.Los Angeles, CA 900331225216351
  17. Delora Climaco, MD.Mission Hills, CA 913451407880743
  18. Edmond Clinton, M.D.Pasadena, CA 911011720094097
  19. Robert Clinton, M.D.Chino, CA 917101265566699
  20. Amy Clouse, MDWalnut Creek, CA 945951376836999
  21. William Clusin, MDStanford, CA 943051295816643
  22. Christopher John Co, M.DOakland, CA 946061679704969
  23. Thien-Kim Co, DOLos Angeles, CA 900331033732953
  24. Lynn Coates, MDCarson, CA 907451851380315
  25. Reginald Coates, MDWinnetka, CA 913061306909072
  26. Fabiola Cobarrubias, MDSan Francisco, CA 941151104042027
  27. Carmen Cobb-WalchSan Francisco, CA 941581447526454
  28. Brian Coburn, MDSan Diego, CA 921141528528676
  29. Nancy Jo Coburn, MDCarmichael, CA 956081841300985
  30. William Coburn, M.D.Thousand Oaks, CA 913611144336983
  31. Jack Cochran, MDCorona, CA 928791700974938
  32. Clare CodaBeverly Hills, CA 902101356731665
  33. Sarah Cody, MDSan Jose, CA 951281568425437
  34. Sean Cody, MDVictorville, CA 923951639813009
  35. Edwin Coe, MDSan Francisco, CA 941151235267899
  36. Susan Coffey, MDSan Francisco, CA 941101245347020
  37. Philip Coffino, MDSan Francisco, CA 941431881917672
  38. Eliane CofflerRancho Mirage, CA 922701881181469
  39. Brian Cogburn, M.D.San Francisco, CA 941111205195112
  40. Martin Cogburn, MDAntioch, CA 945091134208275
  41. Landis Coghlan, M.D.Los Angeles, CA 900951710116439
  42. Gary Cohan, M.D.Beverly Hills, CA 902111952450769
  43. Kamyar Cohanshohet, MDBeverly Hills, CA 902121437149242
  44. Paul Cohart, MDBeverly Hills, CA 902101669465050
  45. Alan Cohen, M.D.Fresno, CA 937031821058546
  46. Alan Cohen, MDOakland, CA 946091285640524
  47. Beth Cohen, MDSan Francisco, CA 941211558461400
  48. Daniel Cohen, MDSacramento, CA 958251578641296
  49. David Cohen, M.D.Los Angeles, CA 900341477996395
  50. Douglas Cohen, M.D.Mill Valley, CA 949411932127248

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.