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 / IL

SEAN DENNIS OCONNOR, MD

INTERNAL MEDICINE

Medical school: UNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB)

Graduated: 1994

NPI: 1609831528

Practice Locations (1)

211 E CHICAGO AVE, SUITE 1700

CHICAGO, IL 606112672

3129448979

Source: CMS National Downloadable File, September 2026.

SEAN OCONNOR, MD | HealthCareAtlasUSA