NPPES file of Aug 9, 2026

Diego Cesar Guillen, AUD

Audiologist · Bakersfield, CA

Diego Cesar Guillen, AUD is an audiologist with a practice address in Bakersfield, California, and NPI 1336071729, issued on Jun 1, 2026. Check the license (California AU4044, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026
1336071729
Name
Diego Cesar Guillen
Credential
AUD
Primary taxonomy
Audiologist 231H00000X
License number
AU4044 CA
Self-reported in NPPES; status is on the state search
Practice location
4200 Ashe RD, Bakersfield, CA 93313
Phone
(661) 831-8331
Enumerated
Jun 1, 2026
Record last updated
Jun 1, 2026
Fax
(661) 398-2141
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). 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 4200 Ashe RD

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

  1. Judith Ayala-Cadena, LCSW, MSWSchool Social Worker1821583485
  2. Diana CoxSchool Social Worker1689440182
  3. Nancy Curran, RNSchool Registered Nurse1619456092
  4. Simaranjeet Grewal, M.S. SLPSpeech-Language Pathologist1821933185
  5. Ariana HarmonSchool Registered Nurse1083192611
  6. Christie HebertSchool Registered Nurse1891273421

Verify Diego Cesar Guillen 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 AU4044    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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Diego Cesar Guillen among 1,561 audiologist records in California

Diego Cesar Guillen, AUD 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 not. Its NPI, issued in 2026, is newer than 96% of them.

  • NPI issued2026 · 96% of these records are older, 0% newer
  • In a Medicare fileNo · 23% of these records are
  • In the CMS Doctors and Clinicians fileNo · 28% of these records are
  • Record last updated2026 · 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).

Audiologist providers in California

There are 1,561 audiologist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,561 in California → Every provider in Bakersfield → Audiologist nationwide →

The 8 audiologist records with the nearest ZIP codes

  1. Brady Clayton, AUDBakersfield, CA 933141023994084
  2. Rachel Carl, AU.D.Bakersfield, CA 933091528483989
  3. Diana Wu, AUDBakersfield, CA 933091841079985
  4. Douglas Andersen, MABakersfield, CA 933011215095674
  5. Reid AdamsVisalia, CA 932911184897324
  6. Kristal Calloway, AUDIOLOGISTVisalia, CA 932911194999557
  7. Brittany Paine, AU.DVisalia, CA 932911457992513
  8. Douglas MartinVisalia, CA 932771801271275

Common questions

What is Diego Cesar Guillen, AUD's NPI number?

Diego Cesar Guillen, AUD's National Provider Identifier (NPI) is 1336071729, issued on Jun 1, 2026. An NPI identifies a provider in billing; it is not a license.

Where is Diego Cesar Guillen, AUD located?

The NPPES record lists a practice address at 4200 Ashe RD, Bakersfield, CA, 93313. Phone: (661) 831-8331. Providers update this record themselves, so call before visiting.

How can I verify Diego Cesar Guillen, AUD's license?

NPPES lists California license number AU4044, 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. 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.