1. Short title This Act may be cited as the Medicare at 55 Act . 2. Medicare buy-in option for individuals 55 to 64 years of age (a) In general Title XVIII of the Social Security Act ( 42 U.S.C. 1395c et seq.) is amended by adding at the end the following new section: 1899C. Medicare buy-in option for individuals 55 to 64 years of age (a) Option (1) In general Every individual who meets the requirements described in paragraph (3) shall be eligible to enroll under this section. (2) Part A, B, and D benefits An individual enrolled under this section is entitled to the same benefits (and shall receive the same protections) under this title as an individual who is entitled to benefits under part A and enrolled under parts B and D, including the ability to enroll in a Medicare Advantage plan that provides qualified prescription drug coverage (an MA–PD plan). (3) Requirements for eligibility The requirements described in this paragraph are the following: (A) The individual is a resident of the United States. (B) The individual is— (i) a citizen or national of the United States; or (ii) an alien lawfully admitted for permanent residence. (C) The individual is not otherwise entitled to benefits under part A or eligible to enroll under part A or part B. (D) The individual has attained 55 years of age but has not attained 65 years of age. (b) Enrollment