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

PETER OBRIEN

MENTAL HEALTH COUNSELOR

Graduated: 2022

NPI: 1366165755

Practice Locations (2)

43 BROAD ST, SUITE B206

HUDSON, MA 017492556

435 COLD BROOK DR, APT 409

SUDBURY, MA 017761861

Source: CMS National Downloadable File, September 2026.

PETER OBRIEN | HealthCareAtlasUSA