Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gretchen Hennegan, NP

Gerontology Nurse Practitioner in North Olmsted, OH · enumerated 2013.

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

National Provider Identifier

1821426453

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Registry record

Entity type Individual (Type 1)

Name Gretchen Hennegan

Credential NP

Sex Female

Practice address 25000 Country Club Blvd, Suite 255, North Olmsted, OH, 44070

Phone (440) 793-2255

Fax (440) 793-7194

Enumeration date Oct 16, 2013

Last updated in NPPES Oct 16, 2013

Taxonomy & licenses

363LG0600X Gerontology Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License COA.15113-NP (OH) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP 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 Gretchen Hennegan practice?

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

What is the NPI number for Gretchen Hennegan?

The National Provider Identifier (NPI) for Gretchen Hennegan is 1821426453, 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 2013-10-16.