NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Grace Marvin

Family Nurse Practitioner in Windham, NH · enumerated 2011 · practices at Graceful Health, Pllc.

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

National Provider Identifier

1821393018

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Grace Marvin
Sex Female
Practice address 16 Alpine Rd, Windham, NH, 03087
Phone (603) 799-2420
Fax (978) 228-6775
Enumeration date Jan 19, 2011
Last updated in NPPES Aug 7, 2023

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN264965 (MA) Secondary
363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 055837-23 (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 Grace Marvin?
The National Provider Identifier (NPI) for Grace Marvin is 1821393018, a Type 1 (individual) record in the CMS NPPES registry.
Where does Grace Marvin practice?
The practice location on file with NPPES is in Windham, NH. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-07.