The study was conducted in an urban community mental health center with about 400 seriously mentally ill adults, most of whom were African American and economically disadvantaged. Subjects were rated at 6 and 12 months after intake on a variety of variables that informed the quality of primary care and preventive services they were receiving as well as direct health outcomes. Not surprisingly, there were significant group differences in many of the measures of the quality of primary care, but less so in terms of direct health outcomes. Some of the improvements in the quality measures were fairly dramatic. For example, at intake, only about one-third of patients in both groups had undergone a physical exam by a primary care provider over the previous year. At the 12-month follow-up evaluation, this increased to over 70% for the care management group, while there was no change for the comparison group. Significant improvements in the treatment group were also seen in the use of appropriate screening measures and vaccinations. On an overall measure of appropriate preventive services, the care management group increased almost threefold, from 21.5% to 58.7%, with no change in the comparison group (21.6% to 21.8%).