Adolescence is a crucial period of the lifecourse that entails major developmental changes and offers unique opportunities for preventing risky behaviors and onset of chronic conditions of adulthood. The problems of adolescence extend and often worsen in young adulthood, showing a need for preventive interventions. Preventive services allow for early identification and intervention, however, not all adolescents receive at least a well-visit annually. The Title V Maternal and Child Health Services Block Grant charged states to prioritize annual preventive visits for AYAH through National Performance Measure #10: the percent of adolescent (ages 12-17) with a past-year preventive visit. In response and to build capacity of state MCH programs, the AYAH National Resource Center launched a multi-cohort of select states to execute the AYAH Collaborative Improvement and Innovation Network (CoIIN). The AYAH CoIIN propelled Title V Programs to build their capacity around fostering new and expanding existing partnerships across public health and clinical care systems to advance the well-being of youth. The participating states brought together multi-disciplinary team members representing the medical, public health, systems, and youth leadership sectors and developed an action plan to implement in local communities and demonstration clinics focused on rapid-change quality improvement cycles (e.g. PDSA) to test strategies and approaches. State teams worked together on 3 collective aims across all of the participating states: 1. Increase access and utilization of preventive services 2. Improve the quality of clinical care for AYAH 3. Improve state- and systems-level policies and practices to assure access to high-quality preventive services.