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

Mr. Gregory Zanieski, MD

Individual provider Surgery Physician · NPI 1235320474

Mr. Gregory Zanieski, MD is a General Surgery in New Haven, Connecticut. Graduated from State University of New York at Stony Brook, School of Medicine in 2002, 24 years ago. Practices with Yale University, a 2,618-clinician group and accepts Medicare assignment. Licensed in Connecticut, New York and Pennsylvania.

Years since qualifying
24
Trained at
State University of New York at Stony Brook, School of Medicine
Licensed in
CT, NY, PA
In the registry since
2007
Specialties on file
5
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Partly verified

Some contact details are missing from the federal record.

Smilow Cancer Hospital At Yale-New Haven 35 Park Street 8th Fl Clinic
New Haven, CT 06510
Phone: (203) 785-3577
Fax: (203) 737-4067
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Surgical Oncology Physician (primary) Taxonomy 2086X0206X · Licence 62463 (CT)
Surgery Physician Taxonomy 208600000X · Licence 256848 (NY)
Surgery Physician Taxonomy 208600000X · Licence MD432356 (PA)
Surgical Oncology Physician Taxonomy 2086X0206X · Licence 256848 (NY)
Surgical Oncology Physician Taxonomy 2086X0206X · Licence MD432356 (PA)

Record details

NPI number1235320474
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 5, 2007
Last updated in NPPESJuly 30, 2019
Mailing addressP.O. Box 208062, 330 Cedar St, Fmb130, Department Of Surgery, Section Of Surgical Oncology, New Haven, CT 06520

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Also practisesSURGICAL ONCOLOGY
Medical schoolSTATE UNIVERSITY OF NEW YORK AT STONY BROOK, SCHOOL OF MEDICINE
Graduated 2002 (24 years in practice)
Group practice Yale University — 2618 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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