Timothy E. Quill is an American physician specialising in palliative care at the University of Rochester Medical Center in Rochester, New York. He is also a board member of the Death with Dignity National Center in Portland, Oregon. Quill was the lead plaintiff in a case that eventually reached the Supreme Court of the United States in 1997, Vacco v. Quill, in which the Court decided that a state law against physician-assisted suicide was constitutional.