NPPES file of Aug 9, 2026

Kortney Mathiesen, AUD

Audiologist-Hearing Aid Fitter · Grass Valley, CA

Kortney Mathiesen, AUD is an audiologist-hearing aid fitter with a practice address in Grass Valley, California, and NPI 1295501286, issued on Nov 30, 2023. Check the license (California AU3820, 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
1295501286
Name
Kortney Mathiesen
Credential
AUD
Primary taxonomy
Audiologist-Hearing Aid Fitter 237600000X
License number
AU3820 CA
Self-reported in NPPES; status is on the state search
Practice location
457 Sutton Way, Grass Valley, CA 95945
Phone
(530) 477-8114
Enumerated
Nov 30, 2023
Record last updated
Nov 30, 2023
Medicare enrollment
Enrolled (PECOS I20231214002536); accepts Medicare assignment
Medical or professional school
Pacific University - College Of Optometry, 2023
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-hearing aid fitter records → All 421 in California → Look up another NPI →

Also registered at 457 Sutton Way

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

  1. Kimberly Bonney, AU.DAudiologist-Hearing Aid Fitter1356442412
  2. Grant Gambrall, AUDAudiologist-Hearing Aid Fitter1821561093
  3. Camille SmithHearing Instrument Specialist1255970836

Verify Kortney Mathiesen 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 AU3820    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. Kimberly Bonney Aud IncGrass Valley, CA

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

Kortney Mathiesen among 421 audiologist-hearing aid fitter records in California

Kortney Mathiesen, AUD is one of 421 audiologist-hearing aid fitter records with a practice address in California. 18% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 92% of them.

  • NPI issued2023 · 92% of these records are older, 6% newer
  • In a Medicare fileYes · 18% of these records are
  • In the CMS Doctors and Clinicians fileYes · 25% of these records are
  • Graduated2023 · median 2009 among the 107 with a school on file
  • Record last updated2023 · 54% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 237600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Audiologist-Hearing Aid Fitter providers in California

There are 421 audiologist-hearing aid fitter records in California.

All 421 in California → Every provider in Grass Valley → Audiologist-Hearing Aid Fitter nationwide →

The 8 audiologist-hearing aid fitter records with the nearest ZIP codes

  1. Sol Barros, M.S.Grass Valley, CA 959451831132943
  2. Kimberly Bonney, AU.DGrass Valley, CA 959451356442412
  3. Karen Bridger, M.A.Grass Valley, CA 959451992900302
  4. Grant Gambrall, AUDGrass Valley, CA 959451821561093
  5. Jasmeen Sahota, AU.DGrass Valley, CA 959451659243350
  6. Elise Gregoire, AUDPenn Valley, CA 959461184068983
  7. Greta Gibeau, AU.D.Chico, CA 959281235763046
  8. Emily Adcock, AU.DYuba City, CA 959911609313931

Common questions

What is Kortney Mathiesen, AUD's NPI number?

Kortney Mathiesen, AUD's National Provider Identifier (NPI) is 1295501286, issued on Nov 30, 2023. An NPI identifies a provider in billing; it is not a license.

Where is Kortney Mathiesen, AUD located?

The NPPES record lists a practice address at 457 Sutton Way, Grass Valley, CA, 95945. Phone: (530) 477-8114. Providers update this record themselves, so call before visiting.

How can I verify Kortney Mathiesen, AUD's license?

NPPES lists California license number AU3820, 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.