Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory Robert Gustavson, APRN

Acute Care Nurse Practitioner in Willimantic, CT · enumerated 2026.

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

National Provider Identifier

1770418030

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Registry record

Entity type Individual (Type 1)

Name Gregory Robert Gustavson

Credential APRN

Sex Male

Practice address 112 Mansfield Ave, Willimantic, CT, 06226

Phone (860) 456-9116

Enumeration date Jun 16, 2026

Last updated in NPPES Aug 18, 2026

Taxonomy & licenses

2085R0204X Vascular & Interventional Radiology Physician Allopathic & Osteopathic Physicians · License 12.017664 (CT) Secondary

363LA2100X Acute Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 92342 (CT) Primary

363LG0600X Gerontology Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 92342 (CT) Secondary

APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN 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

What is the NPI number for Gregory Gustavson?

The National Provider Identifier (NPI) for Gregory Gustavson is 1770418030, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Gustavson practice?

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

Other providers at this practice address

Browse all →

Robert Bundy Pulmonary Disease Physician · Willimantic, CT NPI 1962400630 Anna Bunch Nurse Practitioner · Willimantic, CT NPI 1336149459 Marlene Schwartz Pulmonary Disease Physician · Willimantic, CT NPI 1003892829 Tracy Hawthorne Physician Assistant · Willimantic, CT NPI 1528046646 Nadia Nashid Anatomic Pathology & Clinical Pathology Physician · Willimantic, CT NPI 1932189693 Marilyn Kritzman Anatomic Pathology & Clinical Pathology Physician · Willimantic, CT NPI 1245210913 Marc Guttman Emergency Medicine Physician · Willimantic, CT NPI 1295709186 Margaret Woznica Pulmonary Disease Physician · Willimantic, CT NPI 1154399558

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-08-18.