To amplify the availability of information to understand and improve maternal and infant health, PHII developed MAT-LINK in collaboration with the CDC. MAT-LINK is a surveillance network of clinical sites that shares data on maternal and child health outcomes associated with opioid use disorder during pregnancy to help improve policies, clinical practice recommendations, and clinical decision-making for treatment. PHII built the IT infrastructure that allows these sites to share linked data, perform data quality analyses and determine lessons learned.