An institution that offers skilled services similar to those given in a hospital, such as intravenous injections and physical therapy given by professional staff, to aid rehabilitation following hospitalization of patients who have been discharged. SNFs differ from nursing homes or nursing facilities, which are intended primarily to support elderly and disabled individuals in the tasks of daily living (custodial care). Medicare does not cover custodial care in nursing homes; however, Medicare does cover skilled nursing care, rehabilitation and associated custodial care in SNFs for a limited period of time. Medicaid covers care in all Medicaid-certified nursing facilities.