The Medicare Advantage Improvement Act of 2026 aims to enhance the Medicare Advantage program by streamlining the authorization process for medical services, ensuring that enrollees can access necessary care more quickly and efficiently. The legislation focuses on reducing the time Medicare Advantage organizations take to respond to authorization requests, mandating that by January 1, 2028, these organizations must notify patients and providers of decisions within 72 hours for standard requests and 24 hours for expedited requests.