Abandoned (2010)

Synopsis: A woman brings her boyfriend to the hospital for outpatient surgery, and fights for answers after he seemingly vanishes into thin air. When Mary (Brittany Murphy) dropped Kevin (Dean Cain) off at the hospital, doctors told her that he'd be ready for discharge in just a few short hours. Later, she returns to pick him up, only to be told that no patient with that name was ever registered at the hospital. Frantic, Mary turns to the police, who merely patronize her after discovering that she has a history of mental illness. As Mary's search intensifies, she discovers that Kevin's disappearance may be part of an elaborate cover-up involving the hospital staff, and that her "missing" boyfriend may have been in on the ruse all along.     Source: RottenTomatoes.com