Quick answers
- Which hospitals does Peter T. Brennan work at?
- Medicare's official clinician data lists Peter T. Brennan at 1 hospital: Cayuga Medical Center at Ithaca. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Peter T. Brennan see patients?
- Medicare's clinician data lists 3 practice locations, including Ithaca, NY. Call before your visit to confirm the address.
- What is Peter T. Brennan's specialty?
- Medicare lists Gastroenterology as the primary specialty, and also Internal Medicine.
- Does Peter T. Brennan accept Medicare assignment?
- Yes. Medicare's clinician data says Peter 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 Peter T. Brennan?
- (607) 274-4296, as listed in official Medicare / NPI Registry data.
- What is Peter T. Brennan's NPI number?
- 1780655118. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Peter T. Brennan works
Medicare's Facility Affiliation Data lists Peter T. Brennan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cayuga Medical Center at IthacaIthaca, NY · Acute Care Hospital · CCN 330307
Practice locations
Addresses where Peter T. Brennan is enrolled with Medicare (CMS data updated 2026-10-02).
- 101 Dates DrIthaca, NY 14850 (607) 274‑4296
- 2435 N Triphammer RdIthaca, NY 14850 (607) 252‑3620
- 310 Taughannock Blvd, Suite 4Ithaca, NY 14850 (607) 269‑0100
Group practices
Medicare enrollment lists Peter T. Brennan as a member of this group (CMS data updated 2026-10-02).
- Cayuga Medical Associates PC282 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Ithaca
Clinicians with the same Medicare primary specialty in Ithaca, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1980 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1780655118 |
| 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