CFR›Title 42›Chapter IV›Part 406 ContainsSubparts A–DCorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 406—HOSPITAL INSURANCE ELIGIBILITY AND ENTITLEMENT Subparts A Subpart A—General Provisions Sections 406.1–406.7 B Subpart B—Hospital Insurance Without Monthly Premiums Sections 406.10–406.15 C Subpart C—Premium Hospital Insurance Sections 406.20–406.38 D Subpart D—Special Circumstances That Affect Entitlement to Hospital Insurance Sections 406.50–406.52 Authority42 U.S.C. 1302, 1395i-2, 1395i-2a, 1395p, 1395q and 1395hh.Source48 FR 12536, Mar. 25, 1983, unless otherwise noted. Redesignated at 51 FR 41338, Nov. 14, 1986. Previous 405 Part 405—Federal Health Insurance for the Aged and Disabled Next 407 Part 407—Supplementary Medical Insurance (SMI) Enrollment and Entitlement