NPPES file of Aug 9, 2026

Allergy & Immunology (Internal Medicine) Physician in California

81 NPPES records list allergy & immunology (internal medicine) physician with a practice address in California, 0.2 per 100,000 residents, the 11th highest rate of 47. San Francisco and Los Angeles have the most; each record links to the provider's NPI and the California license search. Page 2 of 2.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RA0201X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

San Francisco has the most, 12

  1. San Francisco12
  2. Los Angeles8
  3. Sacramento4
  4. San Diego4
  5. Davis3

Allergy & Immunology (Internal Medicine) Physician records in California

  1. Nisha Patel, MDSan Mateo, CA 944011336392547
  2. Belle Peralejo, M.D.Fresno, CA 937201104031327
  3. Michele Pham, M.D.San Francisco, CA 941431194169300
  4. Liza Presser Belkin, M.D.Santa Barbara, CA 931111982709036
  5. Kenneth Quinto, M.D.La Jolla, CA 920931104073782
  6. Cynthia Ramirez, RNOakland, CA 946021134723174
  7. Bruce Ryhal, MDRoseville, CA 956781902812795
  8. Andrew Saxon, MDLos Angeles, CA 900951174543318
  9. Nicholas Scanlon, M.D.San Diego, CA 921031477084606
  10. Amie Schweis, MDRedondo Beach, CA 902771124481809
  11. Trisha Sharma, M.D.Irvine, CA 926041811315781
  12. Ryan Shilian, DOEncino, CA 914361598144032
  13. Aminaa SiddiqiDavis, CA 956161619363314
  14. Lynn Spitler, MDSan Francisco, CA 941171588867535
  15. Howard Strom, MDLos Angeles, CA 900681407153000
  16. Raffi TchekmedyianTorrance, CA 905051659831287
  17. Suzanne Teuber, M.D.Davis, CA 956161619950516
  18. Kavitha ThiagarajanSan Francisco, CA 941431528695707
  19. Clara Toro, M.D.Chula Vista, CA 919101962438192
  20. Jesus Torpoco, MDReseda, CA 913351386744357
  21. Monica TsaiOrange, CA 928681598176497
  22. Lulu TsaoSan Francisco, CA 941431780047779
  23. Kevin Tse, M.D.La Jolla, CA 920371558528976
  24. Roger Wang, D.O.San Francisco, CA 941081164522165
  25. Sven Wang, MDLong Beach, CA 908151134707805
  26. Xinyu Wang, MD, PHDSan Diego, CA 921031720548001
  27. Ray Williams, M.D.Inglewood, CA 903011144245838
  28. Andrew Wong, M.D.Manhattan Beach, CA 902661083983845
  29. Yu Wong, MDPalo Alto, CA 943041043486863
  30. Richard Wu, M.D.South San Francisco, CA 940801639532211
  31. Linda Zhu, MDStanford, CA 943051063839264

Source: CMS NPPES, primary taxonomy 207RA0201X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 11 of 47 per resident

  1. Kansas0.3
  2. North Dakota0.3
  3. Connecticut0.2
  4. California0.2
  5. Colorado0.2
  6. Arkansas0.2
  7. 50 states and D.C.0.2

Source: CMS NPPES, primary taxonomy 207RA0201X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

66.7% of these records appear in a Medicare file, against 78.6% 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. California66.7%
  2. United States78.6%

Allergy & Immunology (Internal Medicine) Physician records in California, measured

  • In a Medicare file54 of 81 · 66.7% here, 78.6% nationally
  • In the CMS Doctors and Clinicians file46 · 56.8% here, 64.0% nationally
  • Not updated in five years or more40 · 49.4% here, 51.0% nationally
  • Median graduation year2010 · the 46 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RA0201X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

81 NPPES records list allergy & immunology (internal medicine) physician (207RA0201X) as their primary taxonomy with a practice address in California: 0.2 per 100,000 residents against 0.2 nationally (50 states and D.C.). San Francisco has 12 of them (15%).

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 York61
  2. Texas50
  3. Maryland30
  4. Missouri28

States with a similar rate per 100,000

  1. Colorado0.2
  2. Virginia0.2
  3. Illinois0.2
  4. New Jersey0.2

The largest states

  1. New York61
  2. Texas50
  3. Maryland30
  4. Missouri28
  5. Florida25

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.