Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Holly Ann Estill

Perfusionist in Milwaukee, WI · enumerated 2007.

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

National Provider Identifier

1417130923

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Registry record

Entity type Individual (Type 1)

Name Holly Ann Estill

Sex Female

Practice address 8701 Watertown Plank Rd, Hub 5th Floor, Milwaukee, WI, 53226

Phone (414) 955-6904

Fax (414) 955-0079

Enumeration date Dec 7, 2007

Last updated in NPPES Oct 13, 2025

Taxonomy & licenses

242T00000X Perfusionist Technologists, Technicians & Other Technical Service Providers · License 93-018 (WI) 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.

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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 Holly Estill?

Holly Estill is registered in NPPES with the primary taxonomy of Perfusionist. 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 2025-10-13.