Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregg H. Grinspan, MD

Emergency Medicine Physician in Winsted, CT · enumerated 2006.

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

National Provider Identifier

1568558690

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Registry record

Entity type Individual (Type 1)

Name Gregg H. Grinspan

Credential MD

Sex Male

Practice address 115 Spencer St, Winsted, CT, 06098

Phone (860) 738-6650

Enumeration date Oct 5, 2006

Last updated in NPPES Jan 15, 2020

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 023060 (CT) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 023060 (CT) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
023060	Other	-	CONNECTICARE

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 Gregg Grinspan?

The National Provider Identifier (NPI) for Gregg Grinspan is 1568558690, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregg Grinspan practice?

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

Other providers at this practice address

Browse all →

Richard Dutton Surgery Physician · Winsted, CT NPI 1932100351 Donna Mchugh Internal Medicine Physician · Winsted, CT NPI 1518949536 Andrew Szczepanski Internal Medicine Physician · Winsted, CT NPI 1689656613 Carol Hahn Orthopedic Physical Therapist · Winsted, CT NPI 1053374348 Richard Krinsky Pulmonary Disease Physician · Winsted, CT NPI 1124084819 Mohammad Khera Pediatrics Physician · Winsted, CT NPI 1073570784 Swensen Riverside Medical Center, LLC Family Medicine Physician · Winsted, CT NPI 1245289396 Andrew Gallagher Physical Therapist · Winsted, CT NPI 1174562805

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-01-15.