Medicare Advantage plans need an effective procedure to develop, compile, evaluate and report information to the Centers for Medicare and Medicaid Services (CMS) in the time and manner that CMS requires. Organizations contracted to offer Medicare Part C and Part D benefits are required to report data to CMS on a variety of measures. CMS has developed reporting standards and data validation specifications with respect to the Part C and Part D reporting requirements. These standards and specifications provide guidance on the data validation process for Medicare Advantage plans, cost plans, and Part D sponsors used to conduct data validation checks on their reported Part C and Part D data.