Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Diane Marie Contreras, AU.D.,CCC-A

Audiologist in Milwaukee, WI · enumerated 2006.

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

National Provider Identifier

1952342347

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Registry record

Entity type Individual (Type 1)

Name Ms. Diane Marie Contreras

Credential AU.D.,CCC-A

Sex Female

Practice address 9000 W Wisconsin Ave, Milwaukee, WI, 53226

Phone (414) 266-7674

Fax (414) 266-6189

Enumeration date Jun 9, 2006

Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

231H00000X Audiologist Speech, Language and Hearing Service Providers · License 382156 (WI) Primary

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

Other identifiers

Identifier	Type	State	Issuer
382156	Other	WI	STATE LICENSE NUMBER
41142200	Medicaid	WI	-

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Diane Contreras?

Diane Contreras is registered in NPPES with the primary taxonomy of Audiologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.