Oncology
Michael O'Brien, M.D.
Milwaukee, WI
Dr. Michael O'Brien, MD is a Diagnostic Radiologist who practices in Mequon, WI. He is 50 years old.
22+
Years in Practice
Peer Recognition
- Castle Connolly — Top Doctor
2025-2026 (2 years)
- Healthgrades — Healthgrades Honor Roll
Clinical Focus
Subspecialties
Radiation Oncology
Conditions & Treatments
OsteoarthritisRadiation Therapy
Practice Details
Hospital Affiliations
- Ascension SE Wisconsin Hospital - Elmbrook
Experience
22+ years in practice