Participants in this study will be randomly assigned to either partake in peer-led medical illness self-management group sessions or receive care as usual. Participants assigned to care as usual will continue to receive any services they would have otherwise been offered, but will not receive any additional services through the study. Participants assigned to the medical illness self-management program will attend group sessions once a week for 6 weeks. Sessions will focus on medical self-management, healthy behaviors, and effective use of the general medical system.