NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Gregory M. Gallousis MD PC

Ophthalmology Physician in Stamford, CT · enumerated 2006 · authorized official Gregory Gallousis, Owner/MD.

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

National Provider Identifier

1497793947

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Gregory M. Gallousis MD PC
Other name <Unavail>
Practice address 999 Summer Street, Suite 105, Stamford, CT, 06905
Fax (203) 325-4482
Enumeration date Jun 4, 2006
Last updated in NPPES Aug 16, 2017

Taxonomy & classification

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 044280 (CT) Primary
207WX0009X Glaucoma Specialist (Ophthalmology) Physician Allopathic & Osteopathic Physicians · License 044280 (CT) Secondary

Authorized official

Name Gregory Gallousis
Title Owner/MD

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

How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2017-08-16. Verify at npiregistry.cms.hhs.gov.
Where is Gregory M. Gallousis MD PC located?
The practice location on file with NPPES is in Stamford, CT.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-08-16.