{"data":{"id":"us/20-cfr-418.3620","jurisdiction":"us","citation":"20 CFR 418.3620","heading":"What is the effect of an initial determination?","body":"An initial determination is binding unless you request an appeal within the time period stated in § 418.3630(a) or we revise it as provided in § 418.3678.","path":["Title 20—Employees' Benefits","CHAPTER III—SOCIAL SECURITY ADMINISTRATION","PART 418—MEDICARE SUBSIDIES","Subpart D—Medicare Part D Subsidies"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-20.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:45Z","sha256":"916f543f96381ffbac3260e3506cad7f14fc1a2e2266810caabdf43df5a9aca6","source_id":"us-cfr","stale":true,"prev":"us/20-cfr-418.3615","next":"us/20-cfr-418.3625"},"notice":"GroundRules: Original legal text. Not legal advice."}