Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mr. William H. Letsom, PT

Physical Therapist in Kenosha, WI · enumerated 2005.

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

National Provider Identifier

1356330609

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Registry record

Entity type Individual (Type 1)

Name Mr. William H. Letsom

Credential PT

Sex Male

Practice address Kenosha, WI, 53142

Phone (262) 694-3977

Fax (262) 694-5648

Enumeration date Oct 19, 2005

Last updated in NPPES Jul 8, 2013

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 1882-024 (WI) Primary

PT · Physical Therapist: A licensed movement specialist treating injury and disability through exercise and rehabilitation. About the PT credential

Other identifiers

Identifier	Type	State	Issuer
41811000	Medicaid	WI	-
40189600	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

Where does William Letsom practice?

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

What is the NPI number for William Letsom?

The National Provider Identifier (NPI) for William Letsom is 1356330609, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-07-08.