His clinical interests include breast pain, pancreatectomy (pancreas removal), and achalasia. Patient ratings for Dr. Obrien average 4.5 stars out of 5. Dr. Obrien is an in-network provider for Coventry, Coventry Bronze, Coventry Silver, and more. Before completing his residency at Mount Sinai Medical Center, Cleveland, Dr. Obrien attended medical school at Medical College of Wisconsin. He is affiliated with Euclid Hospital, Hillcrest Hospital, and Marymount Hospital.