{"data":{"id":"us/42-cfr-423.643","jurisdiction":"us","citation":"42 CFR 423.643","heading":"Effect of contract determination.","body":"The contract determination is final and binding unless a timely request for a hearing is filed under 423.651.","path":["Title 42—Public Health","CHAPTER IV—CENTERS FOR MEDICARE \u0026 MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER B—MEDICARE PROGRAM","PART 423—VOLUNTARY MEDICARE PRESCRIPTION DRUG BENEFIT","Subpart N—Medicare Contract Determinations and Appeals"],"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":"bc98facebdbfa86888c7b8dd27c876a04c06d751d2136168fd880a9b47a0ddcc","source_id":"us-cfr","stale":true,"prev":"us/42-cfr-423.642","next":"us/42-cfr-423.650"},"notice":"GroundRules: Original legal text. Not legal advice."}