NPPES file of Aug 9, 2026

Rheumatology Physician in California

926 NPPES records list rheumatology physician with a practice address in California, 2.4 per 100,000 residents, the 20th 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 7 of 19.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RR0500X · 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, 93

  1. Los Angeles93
  2. San Francisco64
  3. San Diego42
  4. Sacramento27
  5. Stanford25

Rheumatology Physician records in California

  1. Bevra Hahn, MDLos Angeles, CA 900951992723936
  2. Mark HallWestlake Village, CA 913611891181103
  3. David Hallegua, M.D.Beverly Hills, CA 902111063416964
  4. Erin Hammett, DO.Santa Barbara, CA 931051467884098
  5. Edward Harris, M.D.Whittier, CA 906011780730838
  6. Asbat Hasan, MDRiverside, CA 925061215499256
  7. Zaynb Hassan, M.DPalm Springs, CA 922621295080984
  8. Alana Haussmann, MDSanta Monica, CA 904041144849274
  9. Michelene Hearth-Holmes, M.D.Redlands, CA 923731306994926
  10. Peter Hendler, MDFremont, CA 945381659456325
  11. Bonnie Hepburn, M.D.San Diego, CA 921031104972850
  12. Reena Heyer, M.D.Mather, CA 956551558556837
  13. Dawn Hnat, M.D.Newport Beach, CA 926601861571812
  14. Gerald Ho, M.D.La Palma, CA 906231205833662
  15. Todd Hofeling, M.D.Santa Rosa, CA 954031447451935
  16. Mehrnaz Hojjati, M. D.Orange, CA 928691720029135
  17. Jison Hong, MDStanford, CA 943051740441823
  18. William Hong, MDInglewood, CA 903011245306745
  19. Howard Hoos, MDOxnard, CA 930301114939287
  20. Arash Horizon, M.D.Los Angeles, CA 900481881694131
  21. Audra Horomanski, MDStanford, CA 943051003202714
  22. David Horwitz, M.D.Los Angeles, CA 900331457389918
  23. Antony Hou, M.D.Upland, CA 917861114926367
  24. Ross Howard, M.D.San Diego, CA 921061447791181
  25. John Hoying, M.D.Redondo Beach, CA 902771417991662
  26. Kenneth Hsu, M.D.Bakersfield, CA 933011053342378
  27. Paul Hsu, PHDSan Diego, CA 921031457858631
  28. Sheri Hsu, M.D.La Quinta, CA 922531831300722
  29. Yun-Han HuangSan Francisco, CA 941431003442096
  30. Arthur Huberman, MDVenice, CA 902911356412266
  31. Brian Huh, M.D.Los Angeles, CA 900201275614455
  32. John Huizar, MDSan Francisco, CA 941431588169221
  33. Charlotte Hurabielle Claverie, MD, PHDSan Francisco, CA 941431356801708
  34. David Hurwitz, MDWoodland Hills, CA 913671073661872
  35. Noreen Hussaini, M.D.Long Beach, CA 908081093907198
  36. Bao Quynh Huynh, M.D.Orange, CA 928691538313648
  37. Doquyen Huynh, MDSan Diego, CA 921031619135241
  38. Jimmy Hwang, M.D.Northridge, CA 913251316965494
  39. Sarah Hwang, M.D.La Palma, CA 906231588682926
  40. John Imboden, MDSan Francisco, CA 941101275689408
  41. Branden Ireifej, MDWhittier, CA 906021811524853
  42. Joseph Isaacson, MDSan Jose, CA 951241356305551
  43. Mariko Ishimori, M.D.Los Angeles, CA 900481487606695
  44. Lloyd Ito, MDSacramento, CA 958231164500880
  45. Priyanka Iyer, M.B.B.S, M.P.HOrange, CA 928681245662055
  46. Karam JabriSan Bernardino, CA 924041740743194
  47. Janel Jacob, M.D.La Jolla, CA 920931851308399
  48. Fatemeh Jafari Farshami, M.D.Mission Viejo, CA 926911386049260
  49. Pegah Jahangiri, MDRedding, CA 960011154881522
  50. Thomas Jamison, MDMartinez, CA 945531336227404

Source: CMS NPPES, primary taxonomy 207RR0500X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 20 of 51 per resident

  1. Missouri2.4
  2. Oregon2.4
  3. South Carolina2.4
  4. California2.4
  5. Nebraska2.3
  6. New Mexico2.3
  7. 50 states and D.C.2.4

Source: CMS NPPES, primary taxonomy 207RR0500X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

81.3% of these records appear in a Medicare file, against 81.6% 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. California81.3%
  2. United States81.6%

Rheumatology Physician records in California, measured

  • In a Medicare file753 of 926 · 81.3% here, 81.6% nationally
  • In the CMS Doctors and Clinicians file643 · 69.4% here, 69.5% nationally
  • Not updated in five years or more571 · 61.7% here, 56.6% nationally
  • Median graduation year2003 · the 641 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RR0500X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

926 NPPES records list rheumatology physician (207RR0500X) as their primary taxonomy with a practice address in California: 2.4 per 100,000 residents against 2.4 nationally (50 states and D.C.). Los Angeles has 93 of them (10%).

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 York599
  2. Texas545
  3. Florida494
  4. Pennsylvania413

States with a similar rate per 100,000

  1. South Carolina2.4
  2. Oregon2.4
  3. Nebraska2.3
  4. New Mexico2.3

The largest states

  1. New York599
  2. Texas545
  3. Florida494
  4. Pennsylvania413
  5. Massachusetts343

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.