; and (2) by adding at the end the following new subsection: (o) Cost transparency For plan year 2021 and subsequent plan years, subject to paragraph (4), each PDP sponsor offering a prescription drug plan shall comply with the following: (1) Toll-free telephone number (A) In general The PDP sponsor offering the prescription drug plan shall have in place a toll-free telephone number under which enrollees in the plan that call the telephone number are able to receive the following information: (i) The enrollee’s out-of-pocket costs for a specific covered part D drug filled by a specific in-network pharmacy. (ii) An explanation of the cost-sharing components for covered part D drugs, both generally and under the plan specifically, including with respect to— (I) deductibles; (II) copayments