Dr. Khan serves on the Translational Research Committee of the National Multiple Sclerosis Society, and is a member of the society's Medical Advisory Board. He is one of the few neurologists in the U.S. serving on the European Charcot Foundation for Multiple Sclerosis Research. He previously served on study sections of the National Institutes of Health, the Canadian Health Research Institute and the Multiple Sclerosis Society of Canada, as well as the U.S. Food and Drug Administration CNS Drug Advisory Committee. He is a member of the American Academy of Neurology, International Society of Magnetic Resonance in Medicine, the International Genetic Consortium in Multiple Sclerosis, and is an elected member of the American Neurological Association.