Individuals eligible to enroll
Every individual who—
(1)#
has attained the age of 65,
(2)#
is enrolled under part B of this subchapter,
(3)#
is a resident of the United States, and is either (A) a citizen or (B) an alien lawfully admitted for permanent residence who has resided in the United States continuously during the 5 years immediately preceding the month in which he applies for enrollment under this section, and
(4)#
is not otherwise entitled to benefits under this part,
shall be eligible to enroll in the insurance program established by this part. Except as otherwise provided, any reference to an individual entitled to benefits under this part includes an individual entitled to benefits under this part pursuant to an enrollment under this section or section 1395i–2a of this title .