NPPES file of Aug 9, 2026

Pediatric Infectious Diseases Physician in California

161 NPPES records list pediatric infectious diseases physician with a practice address in California, 0.4 per 100,000 residents, the 20th highest rate of 49. Los Angeles and Palo Alto have the most; each record links to the provider's NPI and the California license search. Page 4 of 4.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 2080P0208X · 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, 30

  1. Los Angeles30
  2. Palo Alto27
  3. San Diego15
  4. San Francisco11
  5. Madera8

Pediatric Infectious Diseases Physician records in California

  1. Rolando Viani, M.D.San Diego, CA 921231083786602
  2. Vini Vijayan, M.D.Madera, CA 936361538260393
  3. Roopa Viraraghavan, M.D.Santa Ana, CA 927061760553903
  4. Anh Vo, MDOakland, CA 946091912536608
  5. David Vu, M.D.Palo Alto, CA 943041295912459
  6. Jean Wiedeman, M.D.Sacramento, CA 958171144203423
  7. Andrew Wiesenthal, MDSan Francisco, CA 941051558441428
  8. Nava Yeganeh, M.D.Santa Monica, CA 904041225220205
  9. Sylvia Yeh, M.D.Torrance, CA 905021417006990
  10. Matthew Zahn, MDSanta Ana, CA 927061871577833
  11. Kenneth Zangwill, M.D.Torrance, CA 905021144375817

Source: CMS NPPES, primary taxonomy 2080P0208X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 20 of 49 per resident

  1. Vermont0.5
  2. Louisiana0.4
  3. Arkansas0.4
  4. California0.4
  5. New Jersey0.4
  6. Virginia0.4
  7. 50 states and D.C.0.5

Source: CMS NPPES, primary taxonomy 2080P0208X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

48.4% of these records appear in a Medicare file, against 45.7% 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. California48.4%
  2. United States45.7%

Pediatric Infectious Diseases Physician records in California, measured

  • In a Medicare file78 of 161 · 48.4% here, 45.7% nationally
  • In the CMS Doctors and Clinicians file49 · 30.4% here, 28.5% nationally
  • Not updated in five years or more98 · 60.9% here, 57.1% nationally
  • Median graduation year2002 · the 49 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 2080P0208X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

161 NPPES records list pediatric infectious diseases physician (2080P0208X) as their primary taxonomy with a practice address in California: 0.4 per 100,000 residents against 0.5 nationally (50 states and D.C.). Los Angeles has 30 of them (19%).

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 York120
  2. Texas106
  3. Massachusetts86
  4. Pennsylvania83

States with a similar rate per 100,000

  1. New Jersey0.4
  2. Arkansas0.4
  3. Louisiana0.4
  4. Virginia0.4

The largest states

  1. New York120
  2. Texas106
  3. Massachusetts86
  4. Pennsylvania83
  5. Ohio82

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.