Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gretchen May Aoanan Calachan, AUD

Audiologist in Phoenix, AZ · enumerated 2022.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1104559426

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Registry record

Entity type Individual (Type 1)

Name Gretchen May Aoanan Calachan

Credential AUD

Sex Female

Practice address 4530 E Shea Blvd Ste 180, Phoenix, AZ, 85028

Phone (602) 264-4834

Enumeration date Jul 5, 2022

Last updated in NPPES Jan 7, 2025

Taxonomy & licenses

231H00000X Audiologist Speech, Language and Hearing Service Providers · License DA13878 (AZ) Primary

AUD · Doctor of Audiology: A licensed audiologist diagnosing and treating hearing and balance disorders. About the AUD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What is the NPI number for Gretchen May Calachan?

The National Provider Identifier (NPI) for Gretchen May Calachan is 1104559426, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gretchen May Calachan practice?

The practice location on file with NPPES is in Phoenix, AZ. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-01-07.