S. 648 · 114th Congress Medicare Formulary Improvement Act of 2015 StageIn committee SponsorChuck Grassley Introduced2015-03-04 Latest action2015-03-04 · Introduced in Senate Follow Summary Text Subjects Cosponsors (2) Votes (0) Actions Cosponsors (2) Debbie Stabenow Former member Senate MI Democrat Sherrod Brown Former member Senate OH Democrat