NPPES file of Aug 9, 2026

Epilepsy Physician in California

54 NPPES records list epilepsy physician with a practice address in California, 0.1 per 100,000 residents, the 20th highest rate of 42. Stanford and Palo Alto 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 2084E0001X · method

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

Stanford has the most, 12

  1. Stanford12
  2. Palo Alto9
  3. Sacramento7
  4. Orange6
  5. Loma Linda5

Epilepsy Physician records in California

  1. Erica Von Stein, MDStanford, CA 943051598292047
  2. Jessica Walter, MDStanford, CA 943051518281161
  3. Michael Westover, M.D., PH.D.Stanford, CA 943051184653487
  4. Katherine Xiong, MDPalo Alto, CA 943041386149284

Source: CMS NPPES, primary taxonomy 2084E0001X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 20 of 42 per resident

  1. New Jersey0.2
  2. New York0.1
  3. Utah0.1
  4. California0.1
  5. Florida0.1
  6. North Dakota0.1
  7. 50 states and D.C.0.2

Source: CMS NPPES, primary taxonomy 2084E0001X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

92.6% of these records appear in a Medicare file, against 93.9% 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. California92.6%
  2. United States93.9%

Epilepsy Physician records in California, measured

  • In a Medicare file50 of 54 · 92.6% here, 93.9% nationally
  • In the CMS Doctors and Clinicians file43 · 79.6% here, 84.7% nationally
  • Not updated in five years or more4 · 7.4% here, 2.4% nationally
  • Median graduation year2010 · the 43 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 2084E0001X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

54 NPPES records list epilepsy physician (2084E0001X) 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.). Stanford has 12 of them (22%).

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. Texas52
  2. Michigan40
  3. Ohio37
  4. Massachusetts36

States with a similar rate per 100,000

  1. Florida0.1
  2. New York0.1
  3. New Jersey0.2
  4. Georgia0.1

The largest states

  1. Texas52
  2. Michigan40
  3. Ohio37
  4. Massachusetts36
  5. Missouri31

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.