Mark W. Green is the Director of the Center for Headache and Pain Medicine and Professor of Neurology, Anesthesiology, and Rehabilitation at the Icahn School of Medicine at Mount Sinai. He is certified in Neurology by the American Board of Psychiatry and Neurology, and in Headache Medicine through the United Council for Neurologic Subspecialties. He is a fellow in the American Academy of Neurology. Dr. Green has been active in the practice of headache and facial pain since 1978. He has lectured throughout the world on this subject and has written numerous articles on various subjects concerning headaches and facial pain.