Medicare Advantage plans changing or leaving Colorado counties for 2027

30 Medicare Advantage plans are leaving Colorado for 2027 and 31 are changing, each plan counted once. Across the state's 64 counties that is 705 county-level plan listings ending and 488 changing. Pick your county for its numbers.

Colorado counties, most changes first

Also for Colorado: plans rated 4 stars or higher in the 2027 CMS Star Ratings, by Colorado county · every state’s 2027 changes · Colorado Medicare Advantage by city.

What to do before December 7

If you are in a Medicare Advantage plan today, your plan must send you an Annual Notice of Change by September 30 that spells out exactly what is different for 2027. Read it before the Annual Enrollment Period (Open Enrollment), which runs October 15 through December 7.

If your plan is leaving your county, you will get a separate notice and a Special Enrollment Period to choose new coverage. If you do nothing, you may be returned to Original Medicare without drug coverage, so it is worth acting during the window.

A licensed agent can check your doctors and prescriptions against the plans that will actually operate in your county next year. For unbiased help, contact Medicare.gov or 1-800-MEDICARE.