NPPES file of Aug 9, 2026

Geriatric Medicine (Internal Medicine) Physician in California

532 NPPES records list geriatric medicine (internal medicine) physician with a practice address in California, 1.4 per 100,000 residents, the 19th 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 2 of 11.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RG0300X · 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, 77

  1. Los Angeles77
  2. San Francisco57
  3. San Diego38
  4. La Jolla26
  5. Sacramento18

Geriatric Medicine (Internal Medicine) Physician records in California

  1. Charlotte Carlson, M.D.Santa Rosa, CA 954051134446875
  2. Steven Castle, MDLos Angeles, CA 900731619069325
  3. John Cesca, MDPalo Alto, CA 943041861589228
  4. Andrew Chan, MDLos Angeles, CA 900331104975507
  5. Alvin Chang, M.D.Tustin, CA 927801396857181
  6. Anna Chang, M.D.San Francisco, CA 941211942313770
  7. Woody ChangSunnyvale, CA 940861295153187
  8. Kyriacos Charalambides, M.D.Lancaster, CA 935341255589420
  9. Susan Charette, MDLos Angeles, CA 900951447285341
  10. Stephen Chavin, M.D.Santa Rosa, CA 954051225323173
  11. Clara ChenOakland, CA 946071336883024
  12. Grace Chen, M.D.Los Angeles, CA 900951770785297
  13. Pei Chen, MDSan Francisco, CA 941181295054948
  14. Sophia Chen, D.O.Martinez, CA 945531225371016
  15. Justin ChengLos Angeles, CA 900731114486255
  16. Monica ChengSan Francisco, CA 941431386107415
  17. Peter Cheng, M.D.Palo Alto, CA 943011073629564
  18. Norman Chien, MDPasadena, CA 911051184696999
  19. Oscar Chien, M.D.San Gabriel, CA 917761679675904
  20. Chien-Wai Chiu, MDSan Jose, CA 951311013544931
  21. Joshua Chodosh, MDLos Angeles, CA 900951245265040
  22. Jaeyoun Choi, MDSan Diego, CA 921031316613631
  23. Seung Ho Choi, M.D.Los Angeles, CA 900261932145992
  24. Ilsong Chong, M.D.Oceanside, CA 920541831240159
  25. Bindu Chopra, M.D.Cupertino, CA 950141972587426
  26. Allen Chou, MDGarden Grove, CA 928431215919915
  27. Sharon Chow, MDLos Angeles, CA 900251285900373
  28. Bettina Chrysofakis-Baiduc, M.D.Sacramento, CA 958161265724546
  29. Lily Chu, MDBurlingame, CA 940101639195506
  30. Peter Chuang, M.D.Woodland Hills, CA 913641780879445
  31. Sindey Chung, MDMountain View, CA 940411043397987
  32. Brian Clifford, M.D.La Jolla, CA 920371326450263
  33. Harvey Cohen, MDRancho Cucamonga, CA 917301972517423
  34. Rebecca Conant, M.D.San Francisco, CA 941431083656656
  35. Stephanie Cordonnier, MDSan Francisco, CA 941181588230809
  36. Nancy Councelbaum, MDIrvine, CA 926181275635013
  37. Heather Cousins, M DPalo Alto, CA 943041255425807
  38. Daniel Cremin, M.D.Concord, CA 945191386867422
  39. Ashok Daftary, MDStockton, CA 952091861458721
  40. Deborah Dang, M.D.San Francisco, CA 941091558363978
  41. Nouneh Danielyan, M.D.Los Angeles, CA 900291871520726
  42. Katalin Danji, M.D.Loma Linda, CA 923541750504080
  43. Anil Date, M.D.Canyon Country, CA 913511972860864
  44. Vishvanath Date, M.D.Loma Linda, CA 923571851482541
  45. Lucia Dattoma, MDSimi Valley, CA 930651164628384
  46. Sara Davies, MDLa Jolla, CA 920371275229361
  47. Ellen Dayon, MDSeal Beach, CA 907401043279359
  48. William DeardorffSan Francisco, CA 941431003348830
  49. Elaine Deemer, DOTorrance, CA 905051649856162
  50. Katrina Deleon, MDLa Jolla, CA 920371013250778

Source: CMS NPPES, primary taxonomy 207RG0300X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 19 of 51 per resident

  1. Oregon1.6
  2. North Carolina1.4
  3. Illinois1.4
  4. California1.4
  5. Minnesota1.3
  6. Arkansas1.3
  7. 50 states and D.C.1.4

Source: CMS NPPES, primary taxonomy 207RG0300X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

76.7% of these records appear in a Medicare file, against 72.8% 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. California76.7%
  2. United States72.8%

Geriatric Medicine (Internal Medicine) Physician records in California, measured

  • In a Medicare file408 of 532 · 76.7% here, 72.8% nationally
  • In the CMS Doctors and Clinicians file271 · 50.9% here, 51.3% nationally
  • Not updated in five years or more328 · 61.7% here, 61.4% nationally
  • Median graduation year1999 · the 271 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RG0300X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

532 NPPES records list geriatric medicine (internal medicine) physician (207RG0300X) as their primary taxonomy with a practice address in California: 1.4 per 100,000 residents against 1.4 nationally (50 states and D.C.). Los Angeles has 77 of them (14%).

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 York508
  2. Florida287
  3. Texas256
  4. Pennsylvania228

States with a similar rate per 100,000

  1. Minnesota1.3
  2. Illinois1.4
  3. Arkansas1.3
  4. Virginia1.3

The largest states

  1. New York508
  2. Florida287
  3. Texas256
  4. Pennsylvania228
  5. Massachusetts225

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.