Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Winston N Hollister, MD

Anatomic Pathology & Clinical Pathology Physician in Waukesha, WI · enumerated 2005.

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

National Provider Identifier

1487631396

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Registry record

Entity type Individual (Type 1)

Name Dr. Winston N Hollister

Credential MD

Sex Male

Practice address 1111 Delafield St, Suite 112, Waukesha, WI, 53188

Phone (262) 542-9173

Fax (262) 542-4312

Enumeration date Dec 30, 2005

Last updated in NPPES May 9, 2024

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 18665 (WI) Secondary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 18665 (WI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
30541000	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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Winston Hollister?

The National Provider Identifier (NPI) for Winston Hollister is 1487631396, a Type 1 (individual) record in the CMS NPPES registry.

Where does Winston Hollister practice?

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

Other providers at this practice address

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W. Patrick Flanagan Urology Physician · Waukesha, WI NPI 1346240959 Martin Kern Internal Medicine Physician · Waukesha, WI NPI 1215938758 Arnavaz Dua Endocrinology, Diabetes & Metabolism Physician · Waukesha, WI NPI 1619979515 Jessie Brovold Athletic Trainer · Waukesha, WI NPI 1255326831 Vasavi Kumar Physician Assistant · Waukesha, WI NPI 1063408334 William Davies Surgery Physician · Waukesha, WI NPI 1336136985 Stephen Bartos Surgery Physician · Waukesha, WI NPI 1083601645 Christopher Davies Surgery Physician · Waukesha, WI NPI 1437146099

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-05-09.