Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Gregory R D'Onofrio, MD

Individual provider Cardiovascular Disease Physician · NPI 1255304796

Gregory R D'Onofrio, MD is a Cardiovascular Disease (Cardiology) in Stamford, Connecticut. Graduated from George Washington University School of Medicine in 1967, 59 years ago. Practices with Stamford Health Medical Group Inc, a 432-clinician group and accepts Medicare assignment. Licensed in Connecticut.

Years since qualifying
59
Trained at
George Washington University School of Medicine
Licensed in
CT
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

29 Hospital Plz Ste 502
Stamford, CT 06902-3602
Phone: (203) 348-7410
Fax: (203) 961-8488
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 149608 (CT)

Record details

NPI number1255304796
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 7, 2006
Last updated in NPPESSeptember 7, 2023
Mailing address29 Hospital Plaza, Suite 502, Stamford, CT 06902-3602

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1967 (59 years in practice)
Group practice Stamford Health Medical Group Inc — 432 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations7 on file with Medicare

Other providers in Stamford