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 / MA

JOHN J OCONNELL, MD

NEUROLOGY

Graduated: 1987

NPI: 1417932542

Practice Locations (1)

69 STATE ST, SUITE 101

NORTHAMPTON, MA 010603049

4135868156

Source: CMS National Downloadable File, September 2026.