NPPES file of Aug 9, 2026

Ashley Marie Chwastyk, AU.D.

Audiologist · Los Altos, CA

Ashley Marie Chwastyk, AU.D. is an audiologist with a practice address in Los Altos, California, and NPI 1013441583, issued on Apr 12, 2017. Check the license (California 3219, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1013441583
Name
Ashley Marie Chwastyk
Credential
AU.D.
Primary taxonomy
Audiologist 231H00000X
License number
3219 CA
Self-reported in NPPES; status is on the state search
Practice location
496 1St St Ste 120, Los Altos, CA 94022
Phone
(650) 941-0664
Enumerated
Apr 12, 2017
Record last updated
Aug 20, 2025
Fax
(650) 941-2892
Medicare enrollment
Enrolled (PECOS I20200203001307); may accept Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest audiologist records → All 1,561 in California → Look up another NPI →

Also registered at 496 1St St Ste 120

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Ethan Chen, AU.D.Audiologist1134096514
  2. Deborah Clark, AU.D.Audiologist1801935424

Verify Ashley Marie Chwastyk in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 3219    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Pacific Hearing Clinic Inc.Los Altos, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Ashley Marie Chwastyk among 1,561 audiologist records in California

Ashley Marie Chwastyk, AU.D. is one of 1,561 audiologist records with a practice address in California. 23% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 62% of them.

  • NPI issued2017 · 62% of these records are older, 34% newer
  • In a Medicare fileYes · 23% of these records are
  • In the CMS Doctors and Clinicians fileYes · 28% of these records are
  • Graduated2017 · median 2014 among the 433 with a school on file
  • Record last updated2025 · 56% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 231H00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

6 audiologist records list a practice address in Los Altos

They are 6 of the 718 NPPES records with a practice address in Los Altos, and 1,561 audiologist records in California.

All 1,561 in California → Every provider in Los Altos → Audiologist nationwide →

The 8 audiologist records with the nearest ZIP codes

  1. Ethan Chen, AU.D.Los Altos, CA 940221134096514
  2. Deborah Clark, AU.D.Los Altos, CA 940221801935424
  3. Allison Kowalczyk, M.S.Los Altos, CA 940221023278066
  4. Jennifer Lathrop, M.A.Los Altos, CA 940221235279266
  5. Brook Raguskus, AU.D.Los Altos, CA 940221073654331
  6. Rachel Appleton, AUDMenlo Park, CA 940251174022685
  7. Jane Baxter, AU.D.Menlo Park, CA 940251013057223
  8. John Dundas, PH.D.Menlo Park, CA 940251932376498

Common questions

What is Ashley Marie Chwastyk, AU.D.'s NPI number?

Ashley Marie Chwastyk, AU.D.'s National Provider Identifier (NPI) is 1013441583, issued on Apr 12, 2017. An NPI identifies a provider in billing; it is not a license.

Where is Ashley Marie Chwastyk, AU.D. located?

The NPPES record lists a practice address at 496 1St St Ste 120, Los Altos, CA, 94022. Phone: (650) 941-0664. Providers update this record themselves, so call before visiting.

How can I verify Ashley Marie Chwastyk, AU.D.'s license?

NPPES lists California license number 3219, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

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

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.