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

GUNNLAUGUR PETUR NIELSEN, MD

PATHOLOGY

Graduated: 1988

NPI: 1174592653

Practice Locations (1)

MASSACHUSETTS GENERAL PHYSICIANS ORGANIZATION INC

55 FRUIT ST

BOSTON, MA 021142696

6177240287

Source: CMS National Downloadable File, September 2026.

GUNNLAUGUR NIELSEN, MD | HealthCareAtlasUSA