Death Panel by Charles J. Hemphill

Four psychiatric managed care companies take the next logical step in their obsession with cost containment and begin to secretly murder chronic mental patients, making it look like an accident or suicide. After Dr. James Corrigan and his wife are savagely attacked by a former patient, he joins the Death Panel and gets sucked into their vortex of evil. Everything begins to unravel when one of Dr. Corrigan’s friends is sentenced to death and he is unable to go to the police. Can he stop the killing, or will Corrigan be the next item on the agenda?