Individuals deemed enrolled in medical insurance program
Any individual—
(1)#
who is eligible under section 1395 o (a) of this title to enroll in the medical insurance program by reason of entitlement to hospital insurance benefits as described in paragraph (1) of such section, and
(2)#
whose initial enrollment period under subsection (d) begins after March 31, 1973 , and
(3)#
who is residing in the United States, exclusive of Puerto Rico,
shall be deemed to have enrolled in the medical insurance program established by this part.