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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. GARRETT T BRENNAN DDS
NPI 1255320784
Dentist - Pediatric Dentistry in New London, CT

Active since October 18, 2005
190 HEMPSTEAD ST, NEW LONDON, CT 06320(860) 447-3216(860) 701-6019 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Garrett T Brennan Dds NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GARRETT T BRENNAN DDS (NPI 1255320784) is an individual pediatric dentistry provider in New London, Connecticut, licensed in Connecticut (5990) and active in the NPI registry since October 2005.

NPPES Registry Identity

NPI1255320784
Entity TypeIndividualMale
Primary Taxonomy1223P0221X
Provider Legal NameDR. GARRETT T BRENNANCredential: DDS
Location Address190 HEMPSTEAD STNew London, CT 06320-6248
Mailing Address190 Hempstead StNew London, CT 06320-6248 · (860) 447-3216 · Fax (860) 701-6019
Phone(860) 447-3216
Fax(860) 701-6019
Sole ProprietorNo
Enumeration DateOctober 18, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1255320784 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · Pediatric DentistryDental Providers
Taxonomy Code1223P0221X
License✔ Licensed in CT · 5990
Definition
An age-defined specialty that provides both primary and comprehensive preventive and therapeutic oral health care for infants and children through adolescence, including those with special health care needs.
190 HEMPSTEAD ST, New London, CT 06320
Open in Google Maps ↗

Other Identifiers 1

Medicaid2059905CT

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas.Insurance ›

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ARAVIND BALAGOPALAN MENON D.M.D.
Dentist (Pediatric Dentistry)
190 HEMPSTEAD ST
NEW LONDON, CT 06320
Southeastern Connecticut Planning Region (860) 447-3216
DR. CHRISTOPHER BRETT CLARK D.M.D.
Dentist (Pediatric Dentistry)
190 HEMPSTEAD ST
NEW LONDON, CT 06320
Southeastern Connecticut Planning Region (860) 447-3216
DR. GREGORY A TOBACK D.M.D.,M.S.
Dentist (Periodontics)
190 HEMPSTEAD ST
NEW LONDON, CT 06320
Southeastern Connecticut Planning Region (860) 443-5298
ENDODONTICS PC
Dentist (Endodontics)
190 HEMPSTEAD ST
NEW LONDON, CT 06320
Southeastern Connecticut Planning Region (860) 447-0338
DR. DANIEL ROLOTTI DMD
Dentist (Periodontics)
190 HEMPSTEAD ST
NEW LONDON, CT 06320
Southeastern Connecticut Planning Region (860) 443-2428
DR. ELLEN PEARCE DMD
Dentist (Periodontics)
190 HEMPSTEAD ST
NEW LONDON, CT 06320
Southeastern Connecticut Planning Region (860) 443-2428
SHORELINE PERIODONTICS, PC
Dentist (Periodontics)
190 HEMPSTEAD ST
NEW LONDON, CT 06320
Southeastern Connecticut Planning Region (860) 443-5298
DR. KEILA NORMAN DMD
Dentist (Periodontics)
190 HEMPSTEAD ST
NEW LONDON, CT 06320
Southeastern Connecticut Planning Region (860) 443-2428

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Garrett Brennan's NPI number?

The NPI number for Garrett Brennan is 1255320784. It was assigned to this individual provider in the NPPES registry on October 18, 2005.

Where is Garrett Brennan located?

Garrett Brennan practices at 190 Hempstead St, New London, CT 06320. The listed phone number is (860) 447-3216.

What is Garrett Brennan's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Pediatric Dentistry, with taxonomy code 1223P0221X.

What insurance does Garrett Brennan accept?

Health plans from Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and Blue Cross and Blue Shield of Texas list Garrett Brennan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Garrett Brennan was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 26 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.