Quick answers
- Which hospitals does Bruce T. Brennan work at?
- Medicare's official clinician data lists Bruce T. Brennan at 1 hospital: Griffin Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Bruce T. Brennan see patients?
- Medicare's clinician data lists 1 practice location in Ansonia, CT. Call before your visit to confirm the address.
- What is Bruce T. Brennan's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Bruce T. Brennan accept Medicare assignment?
- Yes. Medicare's clinician data says Bruce T. Brennan accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Bruce T. Brennan?
- (203) 734-7100, as listed in official Medicare / NPI Registry data.
- What is Bruce T. Brennan's NPI number?
- 1013927797. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Bruce T. Brennan works
Medicare's Facility Affiliation Data lists Bruce T. Brennan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Griffin HospitalDerby, CT · Acute Care Hospital · CCN 070031
Practice locations
Addresses where Bruce T. Brennan is enrolled with Medicare (CMS data updated 2026-10-02).
- 22 Westfield AveAnsonia, CT 06401 (203) 734‑7100
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Ansonia
Clinicians with the same Medicare primary specialty in Ansonia, CT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | George Washington University School Of Medicine |
| Graduation year | 1978 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1013927797 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians