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

Gwendolyn Marie Cook

Registered Respiratory Therapist in Plainfield, NH · enumerated 2020.

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

National Provider Identifier

1235745894

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Registry record

Entity type Individual (Type 1)

Name Gwendolyn Marie Cook

Sex Female

Practice address Plainfield, NH, 03781

Phone (603) 276-0435

Enumeration date Sep 18, 2020

Last updated in NPPES Sep 18, 2020

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

Taxonomy & licenses

227900000X Registered Respiratory Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 136 (NH) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Gwendolyn Cook?

The National Provider Identifier (NPI) for Gwendolyn Cook is 1235745894, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gwendolyn Cook practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-09-18.