((a)) ** Commencement** The period during which an individual is entitled to benefits under the insurance program established by this part (hereinafter referred to as his “coverage period”) shall begin on whichever of the following is the latest:

((1)) , or (in the case of a disabled individual who has not attained age 65) ; or

((2))

((A)) in the case of an individual who enrolls pursuant to subsection (d) of before the month in which he first satisfies paragraph (1) or (2) of section 1395(a) of this title, the first day of such month,

((B)) in the case of an individual who first satisfies such paragraph in a month beginning before January 2023 and who enrolls pursuant to such subsection (d)—

((i)) in such month in which he first satisfies such paragraph, the first day of the month following the month in which he so enrolls,

((ii)) in the month following such month in which he first satisfies such paragraph, the first day of the second month following the month in which he so enrolls, or

((iii)) more than one month following such month in which he satisfies such paragraph, the first day of the third month following the month in which he so enrolls,

((C)) in the case of an individual who first satisfies such paragraph in a month beginning on or after , and who enrolls pursuant to such subsection (d) in such month in which he first satisfies such paragraph or in any subsequent month of his initial enrollment period, the first day of the month following the month in which he so enrolls, or

((D)) in the case of an individual who enrolls pursuant to subsection (e) of in a month beginning—

((i)) before , the July 1 following the month in which he so enrolls; or

((ii)) on or after , the first day of the month following the month in which he so enrolls; or

((3)) in the case of an individual who is deemed to have enrolled—

((A)) on or before the last day of the third month of his initial enrollment period, the first day of the month in which he first meets the applicable requirements of section 1395(a) of this title or , whichever is later, or

((B)) on or after the first day of the fourth month of his initial enrollment period, and where such month begins—

((i)) before , as prescribed under subparagraphs (B)(i), (B)(ii), (B)(iii), and (D)(i) of paragraph (2), or

((ii)) on or after , as prescribed under subparagraphs (C) and (D)(ii) of paragraph (2).

((b)) ** Continuation** An individual’s coverage period shall continue until his enrollment has been terminated—

((1)) by the filing of notice that the individual no longer wishes to participate in the insurance program established by this part, or

((2)) for nonpayment of premiums.

((c)) ** Termination** In the case of an individual satisfying paragraph (1) of section 1395(a) of this title whose entitlement to hospital insurance benefits under part A is based on a disability rather than on his having attained the age of 65, his coverage period (and his enrollment under this part) shall be terminated as of the close of the last month for which he is entitled to hospital insurance benefits.o

((d)) ** Payment of expenses incurred during coverage period** No payments may be made under this part with respect to the expenses of an individual unless such expenses were incurred by such individual during a period which, with respect to him, is a coverage period.

((e)) ** Commencement of coverage for special enrollment periods** Notwithstanding subsection (a), in the case of an individual who enrolls during a special enrollment period pursuant to section 1395p(i)(3) or 1395p(i)(4)(B) of this title—

((1)) in any month of the special enrollment period in which the individual is at any time enrolled in a plan (specified in subparagraph (A) or (B), as applicable, of or specified in ) or in the first month following such a month, the coverage period shall begin on the first day of the month in which the individual so enrolls (or, at the option of the individual, on the first day of any of the following three months), or

((2)) in any other month of the special enrollment period, the coverage period shall begin on the first day of the month following the month in which the individual so enrolls.

((f)) ** Commencement of coverage for certain volunteers serving outside United States** Notwithstanding subsection (a), in the case of an individual who enrolls during a special enrollment period pursuant to , the coverage period shall begin on the first day of the month following the month in which the individual so enrolls.section 1395p(k) of this title

((g)) ** Special enrollment periods for exceptional circumstances** Notwithstanding subsection (a), in the case of an individual who enrolls during a special enrollment period pursuant to , the coverage period shall begin on a date the Secretary provides in a manner consistent (to the extent practicable) with protecting continuity of health benefit coverage.section 1395p(m) of this title

((h)) ** Coverage period for individuals only eligible for coverage of immunosuppressive drugs** In the case of an individual described in section 1395(b)(1) of this title, 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 , such individual’s coverage period shall begin on the first day of the month in which the individual first satisfies section 1395(b) of this title.

((2)) In the case of such an individual who enrolls (or reenrolls, if applicable) in part B for coverage of immunosuppressive drugs under paragraph (2) or (4) of , such individual’s coverage period shall begin on , 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 (2) shall end when the individual becomes entitled to benefits under this subchapter under subsection (a) or (b) of , or under , or is no longer eligible for such coverage as a result of the application of section 1395(b)(2) of this title.

((5)) The Secretary may conduct public education activities to raise awareness of the availability of more comprehensive, individual health insurance coverage (as defined in ) for individuals eligible under section 1395(b) of this title to enroll or to be deemed enrolled in the medical insurance program established under this part for purposes of coverage of immunosuppressive drugs.

((i)) ** Coverage period for certain Postal Service annuitants and family members** Notwithstanding subsection (a), in the case of an individual who enrolls during the special enrollment period pursuant to section 1395p() of this title, the coverage period shall begin on .January 1, 20252025-01-01o