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 20 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. Robert Stiller, MDSan Jose, CA 951191114003639
  2. Nathan Stockamp, M.D.Los Angeles, CA 900331164695557
  3. Kristi Stonegarza, M.D.San Diego, CA 921341437440526
  4. Greg Strayer, MDLong Beach, CA 908061447208418
  5. Alex Studemeister, MDSan Jose, CA 951281235171620
  6. Amy Sturt, MDPalo Alto, CA 943041417139429
  7. Ashley Styczynski, M.D.Mountain View, CA 940401730447863
  8. Henry Su, M.D.Long Beach, CA 908131902033913
  9. Maiko SuarezStanford, CA 943051013652585
  10. Nida Subhani, MDPleasanton, CA 945881770747784
  11. Aruna Subramanian, M.D.Stanford, CA 943051356371082
  12. Bhanu Sud, MDPlacentia, CA 928701972643344
  13. Kanokrat Suksompoth, M.D.Pomona, CA 917671831109131
  14. Paul Sullam, M.D.San Francisco, CA 941211992807994
  15. Zarchi Sumon, M.D.Modesto, CA 953561093154486
  16. Thrissawan Sungkapalee, M.D.Newport Beach, CA 926631205145265
  17. Made Sutjita, M.D.Moreno Valley, CA 925551053428334
  18. Fayyaz Sutterwala, M.D., PH.D.West Hollywood, CA 900481790866200
  19. Shakuntala Swaminathan, MDLos Angeles, CA 900361396847810
  20. Mark Swancutt, MD PHDSacramento, CA 958111346280211
  21. John Swartzberg, MDBerkeley, CA 947201063550515
  22. Rehan Syed, MD, MSCSan Rafael, CA 949031134653165
  23. John Szumowski, M.D., M.P.H.San Francisco, CA 941211750558615
  24. Tuan Ta, MDSanta Ana, CA 927051114103124
  25. Meher Tabatabai, MDVan Nuys, CA 914011740291301
  26. Rokhsareh Tajrishi, M.D.Corona Del Mar, CA 926251164701819
  27. Angela Talley, MDOakland, CA 946121679683619
  28. Shefali Talwar, M.D.San Mateo, CA 944011376557843
  29. Sara Tamizuddin, MDLa Jolla, CA 920371538626270
  30. Ming Tan, M.D.Irvine, CA 926971538344601
  31. Susanna Tan, M.D.Rancho Santa Margarita, CA 926881790028728
  32. Susanna Tan, MDStanford, CA 943051114242351
  33. Jevon Tang, MDFremont, CA 945381619179504
  34. Michael Tang, MDSan Diego, CA 921031982018545
  35. Michele Tang, M.D.Mountain View, CA 940401851680797
  36. Geraldine Taplin, M.DMonterey, CA 939401144227380
  37. Randy Taplitz, MDDuarte, CA 910101013925551
  38. Mahnaz Taremi, MDSan Diego, CA 921031871727859
  39. Melanie Taylor, MDLos Angeles, CA 900951336169580
  40. Ronald Tempesta, MDSouth San Francisco, CA 940801841378445
  41. Paola Tempesti, MDGlendale, CA 912031093771578
  42. Kathy ThompsonSan Francisco, CA 941031407042955
  43. George Thompson III, MDSacramento, CA 958171831206812
  44. Amanda Thornton, M.D.Vacaville, CA 956881760758726
  45. Elizabeth Thottacherry, MDStanford, CA 943051679007751
  46. Lauri Thrupp, MDOrange, CA 928681366614216
  47. Ye ThuSanta Rosa, CA 954051306180146
  48. Phyllis TienSan Francisco, CA 941211346358835
  49. Vivian Tien, MDStanford, CA 943051588058184
  50. Myres Tilghman, M.D.San Diego, CA 921031841449485

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.