Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Samuel Gregory Williams, PAC

Physician Assistant in Mauston, WI · enumerated 2005.

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

National Provider Identifier

1871580332

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Registry record

Entity type Individual (Type 1)

Name Samuel Gregory Williams

Credential PAC

Sex Male

Practice address 1040 Division St, Mauston, WI, 53948

Phone (608) 847-5000

Enumeration date Sep 30, 2005

Last updated in NPPES Jul 16, 2007

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 363 (WI) Primary

Other identifiers

Identifier	Type	State	Issuer
42939400	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 Samuel Williams?

Samuel Williams is registered in NPPES with the primary taxonomy of Physician Assistant. 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 2007-07-16.