This guidebook from the National Council for Mental Wellbeing provides practical, field-tested recommendations for strengthening collaboration among Certified Community Behavioral Health Clinics (CCBHCs), state agencies, and Medicaid managed care organizations to improve access to mental health and substance use services. It highlights six key strategies, including shared leadership, early stakeholder engagement, staff training, role clarification, data investment, and policies that support clinic financial sustainability, to help states and health plans maximize the impact of the CCBHC model.