Section 6401 (a) of the Affordable Care Act established a requirement for all enrolled providers/suppliers to revalidate their Medicare enrollment information under new enrollment screening criteria. CMS has completed its initial round of revalidations and will be resuming regular revalidation cycles in accordance with 42 CFR §424.515. In an effort to streamline the revalidation process and reduce provider/supplier burden, CMS has implemented several revalidation processing improvements one of which is established due dates by which you must revalidate.