CMS is requiring Medicare physicians and non-physician practitioners who refer Medicare beneficiaries to other Medicare providers or suppliers to update their enrollment records in the Medicare Provider Enrollment, Chain and Ownership System (PECOS). CMS had previously announced that new claims edit processes could lead to rejected DMEPOS and other Part B claims if the ordering physician has not updated his/her enrollment records, effective January 4, 2010. CMS is now delaying the implementation of the claims edits until April 5, 2010, to give physicians and non-physician practitioners sufficient time to establish a current Medicare enrollment record.