American physician specializing in neurosurgery in St. Louis, Missouri, who has helped develop high-flow brain bypass surgery, a less invasive procedure for treating intracranial aneurysm than methods used previously.

He is the Neurosurgeon-in-Chief at the Abdulrauf Institute of Neurosurgery. He is the Founding Professor and Chairman of the Department of Neurological Surgery at Saint Louis University School of Medicine and Director of the Center for Cerebrovascular and Skull Base Surgery at Saint Louis University Hospital in Saint Louis, Missouri.