NCD launched its Medicare Advantage Dental Comparison Tool for 2027 plan renewals on 20 October 2026.^[1] The tool uses public CMS data to compare dental benefits across 5,049 CY2027 Medicare Advantage plans alongside CY2026 plan data.^[2] The release coincides with confirmed changes to the Medicare Advantage market for next year. UnitedHealthcare and Humana will end plans affecting nearly 1 million total enrollees in 2027. Approximately 600,000 Humana members and 390,000 UnitedHealthcare members will be impacted by the closures.^[3][4][5] 1,039 CY2026 Medicare Advantage plans do not appear in 2027 filings. 994 new plans will be offered for the coming year.^[6] NCD analysis found 31% of 2026 Medicare Advantage members are in plans that reduced 2027 annual dental maximum by an average $500.^[7] Major Medicare Advantage carriers are also cutting other supplemental benefits, raising enrollee cost sharing, and shifting to narrower network plans for 2027.^[8]