On August 10, 2010, CMS published a final rule designed to reduce the rate of errors in Medicaid and the Children’s Health Insurance Program (CHIP). The rule implements provisions from the Children’s Health Insurance Program Reauthorization Act of 2009 with regard to the Medicaid Eligibility Quality Control and Payment Error Rate Measurement programs, and it codifies several procedural aspects of the process for estimating Medicaid and CHIP improper payments. The rule is effective September 10, 2010.