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 / AZ

SEAN M. O'BRIEN, DO

INTERNAL MEDICINE

Medical school: AT STILL UNIVERSITY OF HEALTH SCIENCES, COLLEGE OF OSTEO MED, KIRKSVILLE

Graduated: 1990

NPI: 1912994500

Practice Locations (2)

MARIPOSA COMMUNITY HEALTH CENTER INC

1852 N MASTICK WAY

NOGALES, AZ 856211063

5202811550

MARIPOSA COMMUNITY HEALTH CENTER INC

101 TAYLOR ST

PATAGONIA, AZ 856249600

5202811550

Source: CMS National Downloadable File, September 2026.