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 / NH

BRIAN GRETTA, MD

INTERNAL MEDICINE

Graduated: 1986

Also: EMERGENCY MEDICINE

NPI: 1659356384

Practice Locations (1)

EMERGENCY MEDICINE SERVICES OF NH, LLC

1 PARKLAND DR

DERRY, NH 030382746

6034321500

Source: CMS National Downloadable File, September 2026.

BRIAN GRETTA, MD | HealthCareAtlasUSA