Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Casey Marie Williams, M.S CFY-SLP

Speech-Language Pathologist in Janesville, WI · enumerated 2014.

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

National Provider Identifier

1639584261

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Registry record

Entity type Individual (Type 1)

Name Ms. Casey Marie Williams

Credential M.S CFY-SLP

Sex Female

Practice address 1323 Creston Park Dr, Janesville, WI, 53545

Phone (608) 756-9440

Fax (608) 756-9455

Enumeration date Jun 23, 2014

Last updated in NPPES Jun 23, 2014

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 3972-154 (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

Where does Casey Williams practice?

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

What is the NPI number for Casey Williams?

The National Provider Identifier (NPI) for Casey Williams is 1639584261, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-06-23.