Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Diane Gandy Gardner, M.S., CCC-A

Audiologist in Castle Rock, CO · enumerated 2007.

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

National Provider Identifier

1457555096

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Registry record

Entity type Individual (Type 1)

Name Mrs. Diane Gandy Gardner

Credential M.S., CCC-A

Sex Female

Practice address 2352 Meadows Blvd Ste 300, Castle Rock, CO, 80109

Phone (720) 455-3800

Fax (720) 455-3801

Enumeration date Jun 14, 2007

Last updated in NPPES Mar 7, 2022

Taxonomy & licenses

231H00000X Audiologist Speech, Language and Hearing Service Providers · License AUD.0001003 (CO) Secondary

231H00000X Audiologist Speech, Language and Hearing Service Providers · License 23002124A (IN) Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Diane Gardner?

The National Provider Identifier (NPI) for Diane Gardner is 1457555096, a Type 1 (individual) record in the CMS NPPES registry.

Where does Diane Gardner practice?

The practice location on file with NPPES is in Castle Rock, CO. 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 2022-03-07.