1) The Michigan Emergency Department Improvement Collaborative (MEDIC) is a provider-payer partnership funded by Blue Cross Blue Shield of Michigan to improve emergency care quality across 17 hospitals in Michigan. 2) An initial review of MEDIC data found significant gaps and variation in performance across sites for several quality measures related to head injuries, respiratory illnesses, and pulmonary embolism diagnosis. 3) MEDIC aims to close these gaps and improve outcomes through a learning collaborative that facilitates practice change via measurement, feedback, education and sharing of best practices.