Clinical interests for Dr. Defreitas include electrophysiological (EP) study, congenital heart disease, and non-invasive cardiology. Dr. Defreitas is professionally affiliated with Northwestern Memorial Hospital, Northwestern University Feinberg School of Medicine, and Children's Hospital of Chicago Faculty Practice Plan. He is an in-network provider for Blue Cross/Blue Shield, Coventry, United Healthcare Plans, and more. Dr. Defreitas's practice is open to new patients. After completing medical school at the University of California, Los Angeles (UCLA), David Geffen School of Medicine, he performed his residency at Massachusetts General Hospital. He has received the following distinction: Chicago Super Doctors.