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Dr. Gretchen Rachelle Sackmann, AU.D.

Audiologist in Milwaukee, WI · enumerated 2008.

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

National Provider Identifier

1154570638

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Registry record

Entity type Individual (Type 1)
Name Dr. Gretchen Rachelle Sackmann
Credential AU.D.
Sex Female
Practice address 9000 W Wisconsin Ave Ste B340, Milwaukee, WI, 53226
Phone (414) 266-2934
Enumeration date Sep 9, 2008
Last updated in NPPES Sep 3, 2019

Taxonomy & licenses

231H00000X Audiologist Speech, Language and Hearing Service Providers · License 530-156 (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
1154570638 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

What specialty is Gretchen Sackmann?
Gretchen Sackmann 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.
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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-09-03.