S. 4384 · 119th Congress Medicare Advantage Improvement Act of 2026 StageIn committee SponsorRoger Marshall Introduced2026-04-27 Latest action2026-04-27 · Introduced in Senate Follow Summary Text Subjects Cosponsors (3) Votes (0) Actions Cosponsors (3) Christopher Coons Current member Senate DE Democrat James Lankford Current member Senate OK Republican Sheldon Whitehouse Current member Senate RI Democrat