Open enrollment 2027
Medicare Advantage in Montana, county by county.
9 of 50 counties have a page with their 2027 plans, the plans that end and who must pick a new plan. 77,854 people in the state had an individual Medicare Advantage plan in October 2026.
Sources: CMS CY2027 and CY2026 plan files, CMS CPSC enrollment October 2026, CMS 2027 Plan Crosswalk (October 1, 2026). Smaller counties open in the free lookup instead.
Counties
- Beaverheadlookup
- Big Hornlookup
- Broadwaterlookup
- Carbonlookup
- Cascade
- Chouteaulookup
- Custerlookup
- Danielslookup
- Deer Lodgelookup
- Fallonlookup
- Ferguslookup
- Flathead
- Gallatin
- Garfieldlookup
- Glacierlookup
- Golden Valleylookup
- Granitelookup
- Hilllookup
- Jeffersonlookup
- Judith Basinlookup
- Lakelookup
- Lewis and Clark
- Libertylookup
- Lincoln
- Madisonlookup
- McConelookup
- Meagherlookup
- Minerallookup
- Missoula
- Musselshelllookup
- Parklookup
- Petroleumlookup
- Phillipslookup
- Ponderalookup
- Powder Riverlookup
- Powelllookup
- Prairielookup
- Ravalli
- Rooseveltlookup
- Rosebudlookup
- Sanderslookup
- Silver Bow
- Stillwaterlookup
- Sweet Grasslookup
- Tetonlookup
- Toolelookup
- Treasurelookup
- Valleylookup
- Wheatlandlookup
- Yellowstone
All states. Agents can get every county in one file with the AEP 2027 County Kit.