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 8 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. Marc Gurwith, M.D.Menlo Park, CA 940251013348036
  2. Phyllis Guze, M.D.Los Angeles, CA 900731841381217
  3. David Haake, M.D.Los Angeles, CA 900731033209739
  4. Fadi HaddadLa Mesa, CA 919421689692956
  5. Jason Halperin, M.D.Cathedral City, CA 922341952626228
  6. Kamran Hamidi, MDLaguna Beach, CA 926511326038605
  7. Janet Hammond, MD PHDLaguna Niguel, CA 926771811067994
  8. Marwa Hammoud, MDYuba City, CA 959911528391950
  9. Francine Hanberg, MDBurbank, CA 915061114984366
  10. Michael Harbour, MDStanford, CA 943051013022169
  11. Kaitlyn Hardin, MDSacramento, CA 958171689069759
  12. Manju Haridas, M.D.Bell Canyon, CA 913071083805469
  13. John Harris, M.D.Burbank, CA 915051356648703
  14. Grace HaserSan Francisco, CA 941431841745031
  15. Sobya Hashmi, MDFrench Camp, CA 952311427638436
  16. Shawn Hassler, M.D.San Francisco, CA 941021427122928
  17. Naomi Hauser, M.D.Sacramento, CA 958171215319587
  18. Sindalisa Hean, MDSan Diego, CA 921031235559436
  19. James Heffelfinger, M.D.San Rafael, CA 949011619931698
  20. Arash Heidari, M.DBakersfield, CA 933011952407983
  21. Thomas Heineman, MD, PHDSan Diego, CA 921211871472191
  22. Timothy Henrich, M.D.San Francisco, CA 941431902831902
  23. Arnold Henson, MDAnaheim, CA 928071508937418
  24. Jonathan Herman, M.D. PH.D.Los Angeles, CA 900951104289586
  25. Salvador Hernandez, MDAnaheim, CA 928071104993120
  26. Peter Heseltine, MD, FACPOrange, CA 928681487771432
  27. Lena HeungWest Hollywood, CA 900481326257106
  28. Julie Higashi, MD, PHDSan Jose, CA 951261962432674
  29. Edward HillSan Diego, CA 921031316573215
  30. Caroline Ho, DODuarte, CA 910101093219768
  31. Daniel Ho, MDTorrance, CA 905051245867613
  32. Dora Ho, MDStanford, CA 943051619032224
  33. Risa Hoffman, M.D.Los Angeles, CA 900951881841914
  34. Seth Hoffman, MDStanford, CA 943051487187829
  35. Brian Hogan, M.D.Travis Afb, CA 945351689635120
  36. Karen Holbrook, MD, MPHSebastopol, CA 954721235211954
  37. Christopher Holland, M.D.San Luis Obispo, CA 934011063492031
  38. Mark Holodniy, MDPalo Alto, CA 943041073533238
  39. Paul Holtom, M.D.Los Angeles, CA 900331851300032
  40. Marisa Holubar, MDStanford, CA 943051558588939
  41. Heidi Hopkins, MDSan Francisco, CA 941101487878401
  42. Christina Hopson, DODublin, CA 945681265404537
  43. Evalyn Horowitz, M.D.Ione, CA 956401295930188
  44. Stephen Hosea, MDSanta Barbara, CA 931051457411050
  45. Nagma Hossain, MDRedwood City, CA 940631528141520
  46. Warren Howard, MDRiverside, CA 925051063589885
  47. Erin Hsu, M.D.San Francisco, CA 941151366481509
  48. Victor Hsu, M.D.Orange, CA 928681609889484
  49. Carol Hu, M.D.San Jose, CA 951281124286869
  50. Jong Huang, M.D.Los Angeles, CA 900171235233461

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.