Since 2014, Health & Medicine’s Court-Involved Youth Project has worked to address the comprehensive health needs of youth returning to their communities from the juvenile justice system while expanding the capacities of the providers who serve them. This resource guide represents a summary of key learnings from this work—capturing insights from both providers and youth. We hope that it helps the many organizations and systems dedicated to improving care for vulnerable young people to both begin and advance in their efforts to offer comprehensive, youth-affirming care.