 In general populations, peer-led disease self-management interventions have been demonstrated to be feasible, effective, scalable, and to lead to sustainable improvements in self-management and health outcomes. With funding from an R34 intervention development grant from NIMH, the study team has developed and piloted a modified version of the most widely tested and used peer-led self management program, the Chronic Disease Self-Management Program CDSMP, for persons with serious mental illness. Two pilot tests of this intervention, the Health and Recovery Peer HARP program, demonstrated that the program can be implemented with high engagement, retention, and program fidelity, and can result in effect sizes across a range of outcomes comparable to or greater than those seen in general medical populations. 