{"data":{"id":"us/42-cfr-424.522","jurisdiction":"us","citation":"42 CFR 424.522","heading":"Additional effective dates.","body":"(a) Reassignments. (1) The effective date of a reassignment of benefits under § 424.80 is the later of the dates identified in § 424.520(d)(1)(i) and (ii).\n(2) Retrospective billing in accordance with a reassignment of benefits and as described in § 424.521(a)(1) is permissible if the circumstances in § 424.521(a)(1) are applicable.\n(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.","path":["Title 42—Public Health","CHAPTER IV—CENTERS FOR MEDICARE \u0026 MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER B—MEDICARE PROGRAM","PART 424—CONDITIONS FOR MEDICARE PAYMENT","Subpart P—Requirements for Establishing and Maintaining Medicare Billing Privileges"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-42.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:11Z","sha256":"c307185214a0814da49306833d6a0270be6db1194f3824933b840d82999325f8","source_id":"us-cfr","stale":true,"prev":"us/42-cfr-424.521","next":"us/42-cfr-424.525"},"notice":"GroundRules: Original legal text. Not legal advice."}