II 118th CONGRESS 1st Session S. 2129 IN THE SENATE OF THE UNITED STATES June 22, 2023 Mr. Lankford (for himself and Mr. Menendez ) introduced the following bill; which was read twice and referred to the Committee on Finance A BILL To amend title XVIII of the Social Security Act to require PDP sponsors of a prescription drug plan and Medicare Advantage organizations offering an MA–PD plan under part D of the Medicare program that use a formulary to include certain generic drugs and biosimilar biological products on such formulary, and for other purposes.