Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Katherine D Hartsook, PT

Physical Therapist in Winchester, VA · enumerated 2016 · practices at Frederick County School Board.

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

National Provider Identifier

1902341357

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Registry record

Entity type Individual (Type 1)

Name Katherine D Hartsook

Credential PT

Sex Female

Practice address 1415 Amherst St, Winchester, VA, 22601

Phone (540) 667-1800

Fax (540) 667-3839

Enumeration date Dec 21, 2016

Last updated in NPPES Jan 7, 2026

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 2305210644 (VA) Primary

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

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 Katherine Hartsook practice?

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

What is the NPI number for Katherine Hartsook?

The National Provider Identifier (NPI) for Katherine Hartsook is 1902341357, 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 2026-01-07.