Basic requirements
(a)General provisions. Hospital insurance benefits are…#
(a) General provisions. Hospital insurance benefits are available to most individuals age 65 or over and to certain individuals under age 65 who do not qualify for those benefits under subpart B of this part and are willing to pay a monthly premium. This is called premium hospital insurance.
(b)Eligibility of individuals age 65 or over to enroll for…#
(b) Eligibility of individuals age 65 or over to enroll for premium hospital insurance. Any individual is eligible to enroll for Medicare Part A if he or she—
(1) Has attained age 65;
(2) Is a resident of the United States and is either—
(i)A citizen of the United States; or#
(i) A citizen of the United States; or