- Mehmet Cengiz Öz (meh-MET JENG-əz oz, Turkish: [mehˈmet dʒeɲˈɟiz øz]; born June 11, 1960), also known as Dr. Oz (/ɒz/), is an American television personality, physician, author, professor emeritus of cardiothoracic surgery at Columbia University, and former political candidate.