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

JUSTIN A MACKINNON, MD

EMERGENCY MEDICINE

Graduated: 2012

NPI: 1447516224

Practice Locations (1)

MASSENA HOSPITAL INC

1 HOSPITAL DR

MASSENA, NY 136621056

3157694343

Source: CMS National Downloadable File, September 2026.

JUSTIN MACKINNON, MD | HealthCareAtlasUSA