Medicare Advantage plans in Montana, 2027
22 Medicare Advantage plans are sold in Montana for 2027 (31 in 2026); 18 are open to everyone and 7 of those have a $0 premium everywhere they are sold. 17,978 Montana members in September 2026 were in plans that end or leave their county for 2027.
What changes in Montana for 2027?
| In the state | 2026 | 2027 | Change |
|---|---|---|---|
| Plans sold in the state | 31 | 22 | ▼down 9 |
| Plans open to everyone | 27 | 18 | ▼down 9 |
| Plans with a $0 premium everywhere they are sold | 14 | 7 | ▼down 7 |
| Plans that lower the Part B premium | 7 | 5 | ▼down 2 |
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision); CMS plan benefit package files, 2027 and 2026.
Which companies sell the most plans in Montana?
Plans open to everyone, by parent company and the brands it sells under, 2027
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision).
Which Montana counties lose the most?
Plans end in or leave Montana counties 186 times for 2027. Counties with the most members in those plans come first; each links to its 2027 plan list.
| County | Plans open to all | $0 premium | Plans that end or leave | Their members here |
|---|---|---|---|---|
| Yellowstone | 12 | 6 | 12 | 3,913 |
| Flathead | 13 | 6 | 10 | 2,557 |
| Gallatin | 9 | 6 | 2 | 1,993 |
| Ravalli | 7 | 2 | 6 | 1,551 |
| Missoula | 11 | 7 | 2 | 1,548 |
| Cascade | 13 | 6 | 6 | 1,157 |
| Lake | 4 | 2 | 9 | 1,052 |
| Lewis and Clark | 13 | 7 | 2 | 665 |
| Lincoln | 8 | 3 | 2 | 599 |
| Stillwater | 7 | 2 | 3 | 471 |
| Fergus | 6 | 3 | 6 | 305 |
| Chouteau | 7 | 3 | 7 | 219 |
| Sanders | 9 | 3 | 6 | 205 |
| Teton | 10 | 3 | 6 | 179 |
| Beaverhead | 4 | 2 | 2 | 161 |
| Park | 6 | 2 | 3 | 150 |
| Silver Bow | 8 | 3 | 2 | 148 |
| Madison | 6 | 3 | 2 | 137 |
| Big Horn | 5 | 2 | 6 | 114 |
| Mineral | 6 | 3 | 6 | 110 |
| Glacier | 5 | 2 | 10 | 101 |
| Powell | 7 | 3 | 2 | 100 |
| Sweet Grass | 4 | 2 | 6 | 97 |
| Deer Lodge | 7 | 3 | 2 | 62 |
| Jefferson | 9 | 3 | 2 | 61 |
| Carbon | 6 | 2 | 2 | 56 |
| Pondera | 8 | 3 | 6 | 43 |
| Musselshell | 5 | 2 | 6 | 39 |
| Judith Basin | 7 | 3 | 6 | 38 |
| Broadwater | 8 | 3 | 2 | 36 |
| Wheatland | 4 | 2 | 6 | 31 |
| Golden Valley | 5 | 2 | 10 | 25 |
| Granite | 6 | 3 | 2 | 25 |
| Rosebud | 6 | 2 | 6 | 18 |
| Toole | 5 | 2 | 6 | 12 |
| Blaine | 0 | 0 | 0 | 0 |
| Carter | 0 | 0 | 0 | 0 |
| Custer | 0 | 0 | 0 | 0 |
| Daniels | 2 | 1 | 0 | 0 |
| Dawson | 0 | 0 | 0 | 0 |
| Fallon | 2 | 1 | 0 | 0 |
| Garfield | 2 | 1 | 0 | 0 |
| Hill | 0 | 0 | 0 | 0 |
| Liberty | 6 | 3 | 6 | 0 |
| McCone | 0 | 0 | 0 | 0 |
| Meagher | 6 | 3 | 6 | 0 |
| Petroleum | 2 | 1 | 0 | 0 |
| Phillips | 2 | 1 | 0 | 0 |
| Powder River | 2 | 1 | 0 | 0 |
| Prairie | 2 | 1 | 0 | 0 |
| Richland | 0 | 0 | 0 | 0 |
| Roosevelt | 2 | 1 | 0 | 0 |
| Sheridan | 0 | 0 | 0 | 0 |
| Treasure | 5 | 2 | 0 | 0 |
| Valley | 2 | 1 | 0 | 0 |
| Wibaux | 0 | 0 | 0 | 0 |
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision); CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026); CMS monthly enrollment by plan and by county, September 2026 (CMS hides counts under 11).
Which large plans sold in Montana end?
| 2026 plan | Brand | Members in all states, Sept. 2026 |
|---|---|---|
| Blue Cross Medicare Advantage ClassicH0107-003 | Blue Cross and Blue Shield of Montana | 7,201 |
| AARP Medicare Advantage from UHC MT-0002H8211-009 | UnitedHealthcare | 2,310 |
| Blue Cross Medicare Advantage Choice PlusH0107-005 | Blue Cross and Blue Shield of Montana | 2,200 |
| Blue Cross Medicare Advantage OptimumH0107-004 | Blue Cross and Blue Shield of Montana | 1,858 |
| AARP Medicare Advantage from UHC MT-0001H8211-007 | UnitedHealthcare | 1,094 |
| PacificSource Medicare MyCare Choice Rx 29H3864-029 | PacificSource Medicare | 1,082 |
| Blue Cross Medicare Advantage Dental PremierH0107-007 | Blue Cross and Blue Shield of Montana | 894 |
| Blue Cross Medicare Advantage Health ChoiceH0107-010 | Blue Cross and Blue Shield of Montana | 827 |
| AARP Medicare Advantage Patriot No Rx MT-MA01H8211-010 | UnitedHealthcare | 222 |
| PacificSource Medicare MyCare Choice 30H3864-030 | PacificSource Medicare | 185 |
Source: CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026); CMS monthly enrollment by plan and by county, September 2026 (CMS hides counts under 11).
Which plans in Montana lower the Part B premium?
5 plans open to everyone and sold in at least one Montana county pay part of the Part B premium in 2027; the largest reduction comes first.
| 2027 plan | Brand | Monthly reduction |
|---|---|---|
| Humana USAA Honor GivebackH5216-278 | Humana | $150 best in its area |
| Humana USAA Honor GivebackH5216-427 | Humana | $150 best in its area |
| UHC MedicareDirect Patriot No Rx PF-MA01H5435-001 | UnitedHealthcare | $85 |
| Humana USAA Honor GivebackH5525-031 | Humana | $70 |
| Humana Essentials Plus GivebackH7617-024 | Humana | $47 |
Source: CMS plan benefit package files, 2027 and 2026; CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision).
Which Montana counties have no Medicare Advantage plan open to everyone in 2027?
9 counties in Montana have no plan open to everyone for 2027: people there can use Original Medicare with a stand-alone drug plan and a Medigap policy, or a special needs plan if they qualify.
Blaine, MT
No Medicare Advantage plan open to everyone is sold in Blaine, Montana for 2027. 0 plans were sold here in 2026; 0 of them leave. People here can use Original Medicare with one of the 9 stand-alone drug plans offered in Montana.
Carter, MT
No Medicare Advantage plan open to everyone is sold in Carter, Montana for 2027. 0 plans were sold here in 2026; 0 of them leave. People here can use Original Medicare with one of the 9 stand-alone drug plans offered in Montana.
Custer, MT
No Medicare Advantage plan open to everyone is sold in Custer, Montana for 2027. 0 plans were sold here in 2026; 0 of them leave. People here can use Original Medicare with one of the 9 stand-alone drug plans offered in Montana.
Dawson, MT
No Medicare Advantage plan open to everyone is sold in Dawson, Montana for 2027. 0 plans were sold here in 2026; 0 of them leave. People here can use Original Medicare with one of the 9 stand-alone drug plans offered in Montana.
Hill, MT
No Medicare Advantage plan open to everyone is sold in Hill, Montana for 2027. 0 plans were sold here in 2026; 0 of them leave. People here can use Original Medicare with one of the 9 stand-alone drug plans offered in Montana.
McCone, MT
No Medicare Advantage plan open to everyone is sold in McCone, Montana for 2027. 0 plans were sold here in 2026; 0 of them leave. People here can use Original Medicare with one of the 9 stand-alone drug plans offered in Montana.
Richland, MT
No Medicare Advantage plan open to everyone is sold in Richland, Montana for 2027. 0 plans were sold here in 2026; 0 of them leave. People here can use Original Medicare with one of the 9 stand-alone drug plans offered in Montana.
Sheridan, MT
No Medicare Advantage plan open to everyone is sold in Sheridan, Montana for 2027. 0 plans were sold here in 2026; 0 of them leave. People here can use Original Medicare with one of the 9 stand-alone drug plans offered in Montana.
Wibaux, MT
No Medicare Advantage plan open to everyone is sold in Wibaux, Montana for 2027. 0 plans were sold here in 2026; 0 of them leave. People here can use Original Medicare with one of the 9 stand-alone drug plans offered in Montana.
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision); CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026).
80,959 of Montana's 273,869 people with Medicare were in a Medicare Advantage plan in September 2026 (30%).
What else should you check?
- Every plan not offered in 2027By company and state
- Part B giveback plansWhere they are sold
- Every statePlan counts for 2027