The Children's Health Insurance Program Reauthorization Act of 2009 (CHIPRA) reauthorized CHIP and funded it through 2013. Under CHIPRA, Congress provided states with new policy tools to address shortfalls in enrollment and retention, one of which is Express Lane Eligibility (ELE). With ELE, a state's Medicaid and/or CHIP program can rely on another agency's eligibility findings to qualify children for public health coverage. This evaluation describes existing state ELE programs including the administrative costs and ELE enrollment trends, estimates the impact of ELE adoption on total enrollment, and previews the issues that will be examined through future evaluation activities.