Dr. Mattson is board certified in neurology and clinical neurophysiology. He earned his medical degree from the University of Missouri - Columbia School of Medicine and completed his internal medicine training at SSM Health St. Mary's Hospital - St. Louis. He completed his neurology residency at Harvard Medical School at Beth Israel Deaconess Medical Center and The Children's Hospital in Boston, where he served as clinical chief resident. Dr. Mattson completed his fellowship in epilepsy and clinical neurophysiology at Saint Louis University School of Medicine. Dr. Mattson is the director of epilepsy services for SSM Health Neurosciences. His office is located on the SSM Health DePaul Hospital - St. Louis campus.