; and (B) consider the variability of private payor payment rates across market segments and laboratory setttings. (2) Appropriate statistical methods for estimating rates that are representative of the market. (c) Report to Congress Not later than 18 months after the date of the enactment of this Act, the Commission 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; and (2) any recommendations the Commission deems appropriate.