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

Katherine Wargo Gruskay, PNP

Pediatric Nurse Practitioner in Branford, CT · enumerated 2017.

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

National Provider Identifier

1053840546

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Registry record

Entity type Individual (Type 1)

Name Katherine Wargo Gruskay

Credential PNP

Sex Female

Practice address Branford, CT, 06405

Phone (203) 481-5591

Enumeration date Jun 8, 2017

Last updated in NPPES Nov 22, 2022

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

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 10.129329 (CT) Secondary

163W00000X Registered Nurse Nursing Service Providers · License 71152 (NY) Secondary

363LP0200X Pediatric Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 9928 (CT) Primary

363LP0200X Pediatric Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 382784 (NY) Secondary

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 Katherine Gruskay?

The National Provider Identifier (NPI) for Katherine Gruskay is 1053840546, a Type 1 (individual) record in the CMS NPPES registry.

Where does Katherine Gruskay practice?

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

Other providers at this practice address

Browse all →

Linda Waldman Pediatrics Physician · Branford, CT NPI 1093873994 Alan Meyers Pediatrics Physician · Branford, CT NPI 1023167913 Jonathan Harwin Pediatrics Physician · Branford, CT NPI 1376692160 Dawn Torres Pediatrics Physician · Branford, CT NPI 1619020567 Jeannine Rockefeller Family Nurse Practitioner · Branford, CT NPI 1417380858 Chinelo Okwuosa Pediatrics Physician · Branford, CT NPI 1033515275

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-11-22.