Section 424.522 - Additional effective dates(a)Reassignments. A reassignment of benefits under § 424.80 is effective beginning 30 days before the Form CMS-855R is submitted if all applicable requirements during that period were otherwise met.(b)Form CMS-855O enrollment. The effective date of a Form CMS-855O enrollment is the date on which the Medicare contractor received the Form CMS-855O application if all other requirements are met. 86 FR 62419 , Nov. 9, 2021