The New York hospitals that made HealthGrades ' '' clinical excellence '' list this year are NewYork-Presbyterian Hospital , the huge system , based in Manhattan , that includes the main teaching hospitals of Columbia and Cornell Universities ; Lutheran Medical Center in Brooklyn ; White Plains Hospital Center ; Northern Westchester Hospital ; St. Luke 's Cornwall Hospital in Newburgh and Cornwall , in Orange County ; Ellis Hospital in Schenectady ; and Unity Health System Park Ridge Hospital in Rochester .