CMS proposed changes for Medicare Advantage and Part D on October 16, 2026 that would tighten provider-directory accuracy requirements and strengthen enrollee protections. For patients, especially those relying on network information to find in-network care, the proposal targets a common access problem: inaccurate directories that can delay treatment or lead to unexpected costs. The announcement also frames the reforms as part of a broader effort to improve transparency and affordability in Medicare coverage.