ohn Q is a 2002 film by Nick Cassavetes; starring Denzel Washington as John Quincy Archibald, a father and husband whose son is diagnosed with an enlarged heart and then finds out he cannot receive a transplant because HMO insurance will not cover it. Therefore, he decides to take a hospital full of patients hostage until the hospital puts his son's name on the donor's list.

Overview from themoviedb.org