To investigate admissions from nursing homes to a medical intensive care unit (ICU), the authors detailed the major interventions, costs, and outcomes for such patients (n = 67) over a 3-year period and then compared them with those for ICU patients receiving home care or visiting nurse services (240 patients) before admission and all others older than 65 years of age (949 patients). These three groups comprised 37% of total ICU admissions. In contrast to younger patients admitted primarily with acute ischemic heart disease, nursing home patients were more likely to be admitted with cardiopulmonary arrest, infection, and gastrointestinal bleeding. Major interventions of intubation and mechanical ventilation were most frequent for nursing home patients, but total hospital charges differed little among the groups. In-hospital mortality for the nursing home group (28%) was significantly higher than for the home care group (7%) and others older than 65 years of age (7%). Cumulative mortality for the nursing home group reached 66% by 8 months, versus 32% and 26% in the other groups, respectively.