Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Garrett T Brennan, DDS

Pediatric Dentistry in New London, CT · enumerated 2005.

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

National Provider Identifier

1255320784

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Registry record

Entity type Individual (Type 1)

Name Dr. Garrett T Brennan

Credential DDS

Sex Male

Practice address 190 Hempstead St, New London, CT, 06320

Phone (860) 447-3216

Fax (860) 701-6019

Enumeration date Oct 18, 2005

Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

1223P0221X Pediatric Dentistry Dental Providers · License 5990 (CT) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Other identifiers

Identifier	Type	State	Issuer
2059905	Medicaid	CT	-

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

How do I verify Garrett Brennan's NPI record?

Cross-check NPI 1255320784 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1255320784 active?

Yes, as of the latest NPPES snapshot, NPI 1255320784 is active (record last updated 2007-07-09).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.