Diagnosis-related groups and exempt psychiatric units.
D000368:Aged; D003953:Diagnosis-Related Groups; D006760:Hospitalization / Q000191:economics*; D006801:Humans; D001523:Mental Disorders / Q000628:therapy; D011445:Prospective Payment System / Q000191:economics; D011567:Psychiatric Department, Hospital / Q000191:economics*; D014481:United States