Quick answers
- Which hospitals does Gregory R. Donofrio work at?
- Medicare's official clinician data lists Gregory R. Donofrio at 1 hospital: Stamford Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory R. Donofrio see patients?
- Medicare's clinician data lists 8 practice locations, including Stamford, CT, Norwalk, CT and Darien, CT. Call before your visit to confirm the address.
- What is Gregory R. Donofrio's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does Gregory R. Donofrio accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory R. Donofrio 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 Gregory R. Donofrio?
- (203) 276-1000, as listed in official Medicare / NPI Registry data.
- What is Gregory R. Donofrio's NPI number?
- 1255304796. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory R. Donofrio works
Medicare's Facility Affiliation Data lists Gregory R. Donofrio at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Stamford HospitalStamford, CT · Acute Care Hospital · CCN 070006
Practice locations
Addresses where Gregory R. Donofrio is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 8; the Medicare profile lists all.
- 1 Hospital PlzStamford, CT 06902 (203) 276‑1000
- 148 E AveNorwalk, CT 06851 (203) 276‑4850
- 1500 Post RdDarien, CT 06820
- 29 Hospital PlzStamford, CT 06902
- 32 Strawberry Hill CtStamford, CT 06902
Group practices
Medicare enrollment lists Gregory R. Donofrio as a member of this group (CMS data updated 2026-10-02).
- Stamford Health Medical Group Inc444 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Connecticut →
Other cardiologists in Stamford
Clinicians with the same Medicare primary specialty in Stamford, CT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | George Washington University School Of Medicine |
| Graduation year | 1967 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1255304796 |
| 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