NPPES file of Aug 9, 2026

Pediatric Allergy/Immunology Physician in California

52 NPPES records list pediatric allergy/immunology physician with a practice address in California, 0.1 per 100,000 residents, the 22nd highest rate of 42. Los Angeles and San Francisco 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 2080P0201X · 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, 17

  1. Los Angeles17
  2. San Francisco10
  3. Palo Alto6
  4. Sacramento2
  5. San Bernardino2

Pediatric Allergy/Immunology Physician records in California

  1. Ewald Stiehm, M.D.Los Angeles, CA 900951922117993
  2. Jonathan Witonsky, M.D.San Francisco, CA 941431679005813

Source: CMS NPPES, primary taxonomy 2080P0201X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 22 of 42 per resident

  1. Florida0.2
  2. Michigan0.1
  3. Connecticut0.1
  4. California0.1
  5. Iowa0.1
  6. Minnesota0.1
  7. 50 states and D.C.0.2

Source: CMS NPPES, primary taxonomy 2080P0201X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

82.7% of these records appear in a Medicare file, against 65.4% 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. California82.7%
  2. United States65.4%

Pediatric Allergy/Immunology Physician records in California, measured

  • In a Medicare file43 of 52 · 82.7% here, 65.4% nationally
  • In the CMS Doctors and Clinicians file26 · 50.0% here, 36.5% nationally
  • Not updated in five years or more28 · 53.8% here, 55.9% nationally
  • Median graduation year1996 · the 26 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 2080P0201X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

52 NPPES records list pediatric allergy/immunology physician (2080P0201X) as their primary taxonomy with a practice address in California: 0.1 per 100,000 residents against 0.2 nationally (50 states and D.C.). Los Angeles has 17 of them (33%).

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. Ohio50
  2. New York57
  3. Pennsylvania43
  4. Florida40

States with a similar rate per 100,000

  1. Michigan0.1
  2. North Carolina0.1
  3. Texas0.1
  4. Illinois0.2

The largest states

  1. New York57
  2. Ohio50
  3. Pennsylvania43
  4. Florida40
  5. Texas36

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.