HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / NY

MARGARET E GRUARIN

PHYSICIAN ASSISTANT

Graduated: 2015

NPI: 1518341882

Practice Locations (2)

ROSWELL PARK CANCER INSTITUTE

ELM AND CARLTON ST

BUFFALO, NY 142630001

7168452300

ROSWELL PARK CANCER INSTITUTE

6934 WILLIAMS RD, SUITE 300

NIAGARA FALLS, NY 143043080

7168453500

Source: CMS National Downloadable File, September 2026.