Scott William Atlas (born July 5, 1955) is an American radiologist, political commentator, and health care policy advisor. He is the Robert Wesson Senior Fellow in health care policy at Stanford University's Hoover Institution, a conservative think tank. During the United States presidential campaigns of 2008, 2012, and 2016, Atlas was a Senior Advisor for Health Care to several presidential candidates. From 1998 to 2012 he was a professor and chief of neuroradiology at Stanford University Medical Center.