The goal of the CCOULD project was to provide technical assistance to states in linking the Medicaid administrative claims of children and their caregivers with case-level data from the child welfare system and to combine the state-specific datasets into a multi-state, deidentified dataset for secondary data analysis by researchers. The linked dataset would contain information from both child welfare and Medicaid information systems on case demographics, medical diagnoses, services, outcomes, and other relevant information. The data would facilitate research on the relationships between receipt of child and caregiver Medicaid and child welfare services, health care outcomes, and child welfare outcomes. The passage of the 2018 Family First Prevention Services Act (FFPSA) created new incentives for states to better understand services provided by the child welfare system and/or Medicaid to families at risk of entering or re-entering the child welfare system. This project helped to facilitate these connections and research, by supporting data sharing between agencies and providing the technical expertise to support states in completing the work.