on or after January 1, 2022, shall be deemed to have enrolled in the medical insurance program established by this part for purposes of coverage of immunosuppressive drugs. (4) The Secretary shall establish a process under which an individual described in paragraph (1) whose other health insurance coverage described in section 1836(b)(2)(A), or coverage under this part (including the medical insurance program established under this part for purposes of coverage of immunosuppressive drugs) is terminated voluntarily or involuntary may enroll or reenroll, if applicable, in the medical insurance program established under this part for purposes of coverage of immunosuppressive drugs. . (c) Coverage period for individuals only eligible for coverage of immunosuppressive drugs (1) In general Section 1838 of the Social Security Act ( 42 U.S.C. 1395q ) is amended by adding at the end the following new subsection: (g) In the case of an individual described in section 1836(b)(1), the following rules shall apply: (1) In the case of such an individual who is deemed to have enrolled in part B for coverage of immunosuppressive drugs under section 1837(m)(3), such individual’s coverage period shall begin on the first day of the month in which the individual first satisfies section 1836(b). (2) In the case of such an individual who enrolls (or reenrolls) in part B for coverage of immunosuppressive drugs under paragraph (2) or (4) of section 1837(m), such individual’s coverage period shall begin on January 1, 2022 (or such earlier date as the Secretary may specify if practicable for purposes of providing continued coverage of immunosuppressive drugs for such an individual), or the month following the month in which the individual so enrolls (or reenrolls), whichever is later. (3) The provisions of subsections (b) and (d) shall apply with respect to an individual described in paragraph (1) or (2). (4) In addition to the reasons for termination under subsection (b), the coverage period of an individual described in paragraph (1) or