CFR›Title 42›Chapter IV›Part 417›Subpart R ContainsSection 417.640CorpusDaily eCFRDisplayed edition2026-05-20Last updated2026-05-20 Subpart R—Medicare Contract Appeals Sections 417.640 § 417.640 Applicability. Source50 FR 1346, Jan. 10, 1985, unless otherwise noted. Previous Q Subpart Q—Beneficiary Appeals Next U Subpart U—Health Care Prepayment Plans