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 P O'BRIEN, DO

FAMILY PRACTICE

Medical school: WEST VIRGINIA SCHOOL OF OSTEOPATHIC MEDICINE

Graduated: 2016

NPI: 1417480351

Practice Locations (1)

HARBOR HEALTH SERVICES INC

250 MOUNT VERNON ST

DORCHESTER, MA 021253120

6172881140

Source: CMS National Downloadable File, September 2026.

JOHN O'BRIEN, DO | HealthCareAtlasUSA