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
PHYSICIAN ASSISTANT
Graduated: 2018
NPI: 1083110753
ROBERT J OBRIEN JR MD AND ASSOC PC
955 MAIN ST, SUITE G6
WINCHESTER, MA 018901992
7817294878
Source: CMS National Downloadable File, September 2026.