General Info

John O'Brien, MD, is a board-certified Family Medicine physician with over 37 years of experience in the medical field. Dr. O'Brien earned his medical degree from the University of Missouri Columbia. He then went on to complete his internship and residency with Mercy Hospital in St. Louis, MO. Patients of all ages can visit Dr. O'Brien for general primary care services like annual wellness exams, vaccinations, and school and sports physicals. Dr. O'Brien treats acute illnesses, including cough, cold and flu, as well as many chronic conditions. Schedule an appointment today!