Thomas Horn, DO

Thomas Horn, DO

Vice President

Dr. Horn’s involvement with sports goes back to his undergraduate days at Notre Dame, when he worked as a student manager for the football and tennis programs. Now in his third season with the Cardinals organization as a member of the Mercy medical team, he’s passionate about helping patients, especially young adults and athletes, achieve peak performance on and off the field. He enjoys working in collaboration with psychologists and mental strength coaches to promote wellness and preventive care. In his 12 years of practice, he’s worked at all levels of mental health care and developed collaborative care models for the primary care setting. He currently serves as medical director for behavioral health as well as regional neurosciences service line chair at Mercy. Dr. Horn earned a BA from the University of Notre Dame, DO from the University of North Texas Health Science Center as did his psychiatry residency at the University of Oklahoma - Tulsa. 


Dr. Horn lives in St. Louis with his wife Maggie and their children Liam, Grace, Brigid, Andrew and James. He’s an avid tennis player and volunteers his time with scouting programs.