Philippe Mercier MD

Philippe J. Mercier, MD, PhD, is a neurological surgery physician and Professor in the Department of Surgery at Saint Louis University, where he also serves as interim Director of the Division of Neurological Surgery/Neurosurgery. He provides comprehensive neurosurgical care with clinical expertise spanning epilepsy surgery, brain and spinal tumors, trauma, and complex spine conditions, including minimally invasive approaches. Dr. Mercier also has specialized experience in pediatric neurosurgery, treating conditions such as hydrocephalus and spasticity, and he performs advanced techniques including image-guided stereotactic procedures and endoscopic cranial surgery. Dr. Mercier completed medical training at the University of Saskatchewan after earning a bachelor’s degree from the University of Toronto, followed by neurosurgery residency training at the University of Calgary. He pursued fellowship training at the University of Tennessee with an emphasis in pediatric neurosurgery. In addition to his clinical training, he earned a PhD in Molecular Biology from the University of Saskatchewan. His research interests include brain tumor biology in both pediatric and adult patients, immune responses to brain tumors, and advances in the treatment of severe head injury. He is active in professional societies including AANS, CNS, and the International Society for Pediatric Neurosurgery.