Med-psych units. Financial viability and quality assurance.

Although medical-psychiatric units may have unique advantages for treating patients with combined medical and psychiatric illness, they may be costly to run, and their success requires a sound financial basis. This begins with filling beds and instituting a waiting list, and then setting admission priorities to regulate case mix deliberately to address financial as well as ethical and clinical considerations. Development of short-stay geropsychiatric evaluation services may offset financial problems associated with long stays of elderly patients requiring definitive treatment for complex conditions. Data are presented to show the effectiveness of deliberate regulation of case mix. Regarding quality assurance, key issues include maintaining documentation to meet HCFA standards for DRG exemption, and effectively integrating physical and psychiatric care, with a special focus on drug interactions and psychiatric toxicities of medical drugs. Effective multidisciplinary treatment planning meeting help in this effort, as do periodic walking rounds focusing specifically on pharmacologic issues. Denials of payment by third parties are most likely to be a problem when both the medical and the psychiatric illness are subacute but their interaction requires conjoint inpatient treatment. Prospective work with PROs can minimize retrospective denials.