Medicare Plan Finder provider directory
Under a 2025 CMS rule, Medicare Advantage plans send their provider directory data to CMS, which shows it in Medicare Plan Finder so people can check which doctors are in each plan before they enroll.
What changed?
CMS's final rule for contract year 2026 (CMS-4208-F2, published 19 September 2025) requires Medicare Advantage organizations to submit provider directory data to CMS in a set format for display in Medicare Plan Finder. CMS published a technical guide describing the data and format.
Why does it matter for plans?
A plan's directory is no longer only on its own website. It sits next to every other plan's directory on a government site, so errors are public and comparable.
What if the data is wrong?
CMS created a special enrollment period for people who chose a plan based on incorrect provider information in Medicare Plan Finder.