Under the ACA, states and territories must establish Medicaid Recovery Audit Contractors (RACs) to identify and recover Medicaid overpayments and identify underpayments. CMS had previously called on states to fully implement their RAC programs by April 1, 2011. In light of operational issues and a pending rulemaking implementing the Medicaid RAC program, however, CMS has withdrawn the April 1, 2011 implementation deadline. Instead, when CMS finalizes its November 10, 2010 proposed rule, it will indicate a new implementation timeline. In a related development, CMS has compiled information on the status of state Medicaid RAC programs on its website.