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Gregory Haffner, M.D.

Ophthalmology Physician in Hamden, CT · enumerated 2006.

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

National Provider Identifier

1407886450

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Registry record

Entity type Individual (Type 1)
Name Gregory Haffner
Credential M.D.
Sex Male
Practice address 2200 Whitney Ave, Suite 300, Hamden, CT, 06518
Phone (203) 288-2020
Fax (203) 288-2470
Enumeration date Jul 4, 2006
Last updated in NPPES Jun 14, 2011

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 043419 (CT) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

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Frequently asked questions

What is the NPI number for Gregory Haffner?
The National Provider Identifier (NPI) for Gregory Haffner is 1407886450, a Type 1 (individual) record in the CMS NPPES registry.
Where does Gregory Haffner practice?
The practice location on file with NPPES is in Hamden, CT. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-06-14.