; and (B) by striking could have been entitled for 24 calendar months, and and inserting could have been entitled for the waiting period (as defined in section 226(j) of the Social Security Act), and . (d) Effective date Except as provided in subsection (c)(1)(B), the amendments made by this section shall apply to insurance benefits under title XVIII of the Social Security Act with respect to items and services furnished in months beginning at least 90 days after the date of the enactment of this Act (but in no case earlier than January 1, 2020). 4. National academy of medicine study and report on delay and prevention of disability conditions (a) Study The Secretary of Health and Human Services (in this section referred to as the Secretary ) shall request that the National Academy of Medicine conduct a study on the range of disability conditions that can be delayed or prevented if individuals receive access to health care services and coverage before the condition reaches disability levels. (b) Report Not later than the date that is 2 years after the date of enactment of this Act, the Secretary shall submit to Congress a report containing the results of the National Academy of Medicine study authorized under this section. (c) Authorization of appropriations There is authorized to be appropriated to carry out this section $750,000 for the period of fiscal years 2020 and 2021.