Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Katie Williamson, MSPT

Physical Therapist in South Weymouth, MA · enumerated 2005.

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

National Provider Identifier

1235122276

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Registry record

Entity type Individual (Type 1)

Name Katie Williamson

Credential MSPT

Sex Female

Practice address 541 Main St, Suite 103, South Weymouth, MA, 02190

Phone (781) 331-9600

Enumeration date Aug 24, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 16540 (MA) 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

What is the NPI number for Katie Williamson?

The National Provider Identifier (NPI) for Katie Williamson is 1235122276, a Type 1 (individual) record in the CMS NPPES registry.

Where does Katie Williamson practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.