NPPES file of Aug 9, 2026

Infectious Disease Physician in California

1,119 NPPES records list infectious disease physician with a practice address in California, 2.9 per 100,000 residents, the 25th 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 3 of 23.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RI0200X · 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, 147

  1. Los Angeles147
  2. San Francisco108
  3. San Diego76
  4. Stanford58
  5. Sacramento56

Infectious Disease Physician records in California

  1. Bryn Boslett, M.D.San Francisco, CA 941431962722439
  2. VI Bowman, M.D.San Diego, CA 921201932365079
  3. Samuel Bozzette, MD, PHDSan Diego, CA 921011992893929
  4. Ulf Fritz Bredeek Mendes, M.D., PHDRedwood City, CA 940621689667495
  5. Mark Bresnik, MDFoster City, CA 944041194928762
  6. Timothy Brewer, MDLos Angeles, CA 900951174523245
  7. Jessica Briggs, M.D.San Francisco, CA 941101689977472
  8. Carol Brosgart, MDBerkeley, CA 947051255018248
  9. Claire Brown, M.D.Los Angeles, CA 900351497970586
  10. Sherrill Brown, M.D.Sacramento, CA 958171447427364
  11. Sara Browne, M.DSan Diego, CA 921031275571176
  12. Harold Burger, M.D.Mather, CA 956551447251681
  13. Hayden Burke, M.D.Cardiff By The Sea, CA 920071902154420
  14. David Busch, M.D.San Francisco, CA 941151942343975
  15. Michael Butera, M.D.San Diego, CA 921201104925205
  16. Rachel BystritskySan Francisco, CA 941431194081984
  17. Raymond ByunMather, CA 956551578545950
  18. Antonio Cabinian, M.D.National City, CA 919501275720294
  19. Douglas Cable, MDNewport Beach, CA 926631861406324
  20. Joseph Cadden, M.D.Los Angeles, CA 900331881640399
  21. Juan Caeiro, M.D.Commerce, CA 900401801951645
  22. Devin Callister, M.D.Walnut Creek, CA 945981376856757
  23. Helene Calvet, M.D.Santa Ana, CA 927011760604516
  24. Mary Cambou, M.D.Los Angeles, CA 900351174901219
  25. Gregory Canfield, M.D., PH.D.San Luis Obispo, CA 934011144632159
  26. Huyen Cao, MDSan Francisco, CA 941431700842234
  27. Joseph Caperna, M.D.San Diego, CA 921011720141153
  28. Aaron Carlin, M.D., PH.D.San Diego, CA 921611760718035
  29. Margrit Carlson, MDLos Angeles, CA 900351497780878
  30. E Duane Carmalt, M.D.Tarzana, CA 913561952597627
  31. Kristin Carr, MDLoma Linda, CA 923541750768362
  32. Stephen Catalya, MDPleasant Hill, CA 945231881100832
  33. Thomas C Cesario, MDOrange, CA 928681265512354
  34. Puneet Chahal, MDSanta Ana, CA 927051811155476
  35. Melony Chakrabarty, MDSacramento, CA 958171316382963
  36. Henry Chambers III, MDSan Francisco, CA 941101184715773
  37. Jamila Champsi, MDSouth San Francisco, CA 940801427136068
  38. Amy Chang, MDStanford, CA 943051962848960
  39. Elisa Chang, M.D.Pasadena, CA 911061811284193
  40. Sandy ChangLoma Linda, CA 923541629465737
  41. Wun-Ling Chang, M.D.La Jolla, CA 920371194734111
  42. Michael Charney, M.D.San Jose, CA 951281700955143
  43. Aarthi Chary, M.D.Stanford, CA 943051588843890
  44. Bharat Chauhan, M.D.Anaheim, CA 928011730243759
  45. Uday Chauhan, MDWhittier, CA 906051285213603
  46. Liza Chavez, M.D.Lakewood, CA 907121316038045
  47. Harman Chawla, M.D.Fremont, CA 945381518251701
  48. Karishma Chawla, M.D.Sacramento, CA 958111295150852
  49. Anucheat Chea, M.D.Greenbrae, CA 949041952663635
  50. Daniel Chelliah, MDMountain View, CA 940401174847933

Source: CMS NPPES, primary taxonomy 207RI0200X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 25 of 51 per resident

  1. Vermont2.9
  2. Hawaii2.9
  3. Wisconsin2.9
  4. California2.9
  5. Louisiana2.8
  6. Virginia2.8
  7. 50 states and D.C.3.2

Source: CMS NPPES, primary taxonomy 207RI0200X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

78.6% of these records appear in a Medicare file, against 79.0% 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. California78.6%
  2. United States79.0%

Infectious Disease Physician records in California, measured

  • In a Medicare file880 of 1,119 · 78.6% here, 79.0% nationally
  • In the CMS Doctors and Clinicians file735 · 65.7% here, 68.4% nationally
  • Not updated in five years or more657 · 58.7% here, 56.5% nationally
  • Median graduation year2003 · the 735 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RI0200X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

1,119 NPPES records list infectious disease physician (207RI0200X) as their primary taxonomy with a practice address in California: 2.9 per 100,000 residents against 3.2 nationally (50 states and D.C.). Los Angeles has 147 of them (13%).

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 York970
  2. Florida760
  3. Texas674
  4. Pennsylvania545

States with a similar rate per 100,000

  1. Wisconsin2.9
  2. Hawaii2.9
  3. Vermont2.9
  4. Louisiana2.8

The largest states

  1. New York970
  2. Florida760
  3. Texas674
  4. Pennsylvania545
  5. Massachusetts487

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.