To amend title XVIII of the Social Security Act to increase data transparency for supplemental benefits under Medicare Advantage.

This bill requires Medicare Advantage (MA) plans to report detailed, individual-level data on supplemental benefits (like dental or vision coverage) starting in 2029. Plans must submit information on eligibility, benefit types, utilization, and costs per enrollee to the Centers for Medicare & Medicaid Services (CMS). Beginning in 2030, CMS must publish this data annually on its website for public research and program evaluation, while protecting individual privacy. The law aims to improve transparency around supplemental benefits without changing the benefits themselves.