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 19 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. Deepesh Yadav, MDFremont, CA 945381689202343
  2. Darice Yang, M.D.Pasadena, CA 911051427255454
  3. Howard Yang, MDSanta Monica, CA 904041730522640
  4. Li Yang, M.D.Monterey Park, CA 917541093918112
  5. Mimi Yang, PA-CWhittier, CA 906021659837250
  6. Monica Yang, MDSan Francisco, CA 941431073906608
  7. Sikai Yang, M.D.Berkeley, CA 947051871904821
  8. Wilson Yap, MDVallejo, CA 945891700964541
  9. Kimia Yavari, MDSacramento, CA 958171033732540
  10. Jinoos Yazdany, M.D.San Francisco, CA 941101982632584
  11. Kei-Lwun Yee, MDWhittier, CA 906021649859885
  12. Wayne Yee, MDFontana, CA 923351851449805
  13. Karen Yeter, MDSan Francisco, CA 941091326210055
  14. David Ying, M.D.San Francisco, CA 941431730421116
  15. Gloria Yiu, M.D., PH.D.Los Angeles, CA 900951902255508
  16. David Yocum, M.D.San Mateo, CA 944041477766772
  17. Wai Chung Yong, MDAlhambra, CA 918011740695790
  18. Arissa Young, M.D.Los Angeles, CA 900951659805893
  19. Haidy Youssef, M.D.Corona, CA 928831881056489
  20. Ernesto Zatarain-Rios, MDBurlingame, CA 940101487720439
  21. Lisa ZhuEncino, CA 914361235524596
  22. Saba Ziaee, MDWalnut Creek, CA 945981396004107
  23. Julie Zikherman, M.D.San Francisco, CA 941431619147436
  24. Natasha Zohuri, M.D.Sacramento, CA 958161932541893
  25. Louis Zucker, MDLos Angeles, CA 900151124128145
  26. Richard Zweig, MDSanta Rosa, CA 954031124102298

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.