; and (2) in subparagraph (B)— (A) in clause (i), by striking through 2019 and inserting through 2020 ; and (B) in clause (ii), by striking 2020 through 2022 and inserting 2021 through 2023 . 3. Study and report by National Academy of Medicine (a) In general Not later than 90 days after the date of the enactment of this Act, the Administrator of the Centers for Medicare & Medicaid Services (referred to in this section as the Administrator ) shall enter into an agreement with the National Academies of Sciences, Engineering, and Medicine (referred to in this section as the National Academies ) to conduct a study to review the methodology the Administrator has implemented for the private payor rate-based clinical laboratory fee schedule under the Medicare program under title XVIII of the Social Security Act ( 42 U.S.C. 1395 et seq.). (b) Scope of study In carrying out the study described in subsection (a), the National Academies shall consider the following: (1) How best to implement the least burdensome data collection process required under section 1834A(a)(1) of such Act ( 42 U.S.C. 1395m–1(a)(1) ) that would— (A) result in a representative and statistically valid data sample of private market rates from all laboratory market segments, including hospital outreach laboratories, physician office laboratories, and independent laboratories; and (B) consider the variability of market segments by laboratory procedure code. (2) Appropriate statistical methods for estimating rates that are representative of the market. (c) Report to Congress Not later than the date that is 18 months after the Administrator enters into the agreement described in subsection (a) with the National Academies, the National Academies shall submit to the Administrator, the Committee on Finance of the Senate, and the Committees on Ways and Means and Energy and Commerce of the House of Representatives a report that includes— (1) conclusions about the methodology described in such subsection