U.S. Code of Federal Regulations
Regulations most recently checked for updates: Sep 17, 2025
(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.
