Medicare Advantage plans in Idaho, 2027
43 Medicare Advantage plans are sold in Idaho for 2027 (46 in 2026); 33 are open to everyone and 11 of those have a $0 premium everywhere they are sold. 63,225 Idaho members in September 2026 were in plans that end or leave their county for 2027.
What changes in Idaho for 2027?
| In the state | 2026 | 2027 | Change |
|---|---|---|---|
| Plans sold in the state | 46 | 43 | ▼down 3 |
| Plans open to everyone | 36 | 33 | ▼down 3 |
| Plans with a $0 premium everywhere they are sold | 17 | 11 | ▼down 6 |
| Plans that lower the Part B premium | 11 | 5 | ▼down 6 |
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 Idaho?
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 Idaho counties lose the most?
Plans end in or leave Idaho counties 251 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 |
|---|---|---|---|---|
| Ada | 19 | 10 | 9 | 14,686 |
| Canyon | 19 | 10 | 9 | 10,007 |
| Kootenai | 8 | 2 | 5 | 6,327 |
| Twin Falls | 9 | 4 | 10 | 4,956 |
| Bannock | 8 | 3 | 6 | 3,358 |
| Bonner | 8 | 2 | 5 | 2,843 |
| Jerome | 6 | 2 | 11 | 1,771 |
| Bingham | 7 | 3 | 6 | 1,754 |
| Elmore | 11 | 6 | 11 | 1,573 |
| Nez Perce | 2 | 0 | 6 | 1,548 |
| Gem | 14 | 8 | 9 | 1,231 |
| Payette | 16 | 9 | 9 | 1,225 |
| Latah | 2 | 0 | 6 | 1,159 |
| Valley | 11 | 6 | 12 | 1,126 |
| Blaine | 1 | 0 | 9 | 1,054 |
| Minidoka | 3 | 1 | 9 | 1,049 |
| Gooding | 8 | 4 | 8 | 899 |
| Cassia | 3 | 1 | 9 | 865 |
| Washington | 13 | 8 | 7 | 679 |
| Idaho | 0 | 0 | 6 | 652 |
| Franklin | 4 | 2 | 5 | 637 |
| Owyhee | 14 | 8 | 10 | 580 |
| Bonneville | 11 | 5 | 2 | 559 |
| Boise | 14 | 8 | 9 | 455 |
| Adams | 4 | 2 | 8 | 432 |
| Benewah | 0 | 0 | 5 | 291 |
| Boundary | 3 | 1 | 2 | 208 |
| Lincoln | 3 | 2 | 7 | 183 |
| Lemhi | 0 | 0 | 4 | 172 |
| Jefferson | 11 | 5 | 2 | 166 |
| Teton | 3 | 2 | 5 | 152 |
| Caribou | 4 | 2 | 5 | 145 |
| Madison | 7 | 3 | 2 | 125 |
| Lewis | 0 | 0 | 5 | 95 |
| Shoshone | 6 | 2 | 2 | 94 |
| Camas | 6 | 4 | 4 | 64 |
| Bear Lake | 4 | 2 | 5 | 57 |
| Fremont | 10 | 5 | 1 | 20 |
| Clearwater | 3 | 1 | 1 | 14 |
| Power | 10 | 5 | 1 | 14 |
| Butte | 0 | 0 | 1 | 0 |
| Clark | 7 | 4 | 1 | 0 |
| Custer | 3 | 2 | 1 | 0 |
| Oneida | 7 | 4 | 1 | 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 Idaho end?
| 2026 plan | Brand | Members in all states, Sept. 2026 |
|---|---|---|
| Saint Alphonsus Health Plan No PremiumH6910-001 | Saint Alphonsus Health Plan | 12,084 |
| Saint Alphonsus Health Plan Cash BackH6910-005 | Saint Alphonsus Health Plan | 9,680 |
| PacificSource Medicare MyCare Choice Rx 24H3864-024 | PacificSource Medicare | 8,456 |
| PacificSource Medicare MyCare Choice Rx 34H3864-034 | PacificSource Medicare | 6,670 |
| Molina Medicare Complete Care SelectH5628-014 | Molina Healthcare of Utah & Idaho | 2,831 |
| AARP Medicare Advantage from UHC ID-0010H2406-112 | UnitedHealthcare | 2,392 |
| PacificSource Medicare Explorer 6H4754-006 | PacificSource Medicare | 2,195 |
| AARP Medicare Advantage from UHC ID-0011H2406-113 | UnitedHealthcare | 2,140 |
| HumanaChoice: Diabetes and HeartH7617-034 | Humana | 1,631 |
| Humana Essentials Plus GivebackH5216-429 | Humana | 1,379 |
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 Idaho lower the Part B premium?
5 plans open to everyone and sold in at least one Idaho county pay part of the Part B premium in 2027; the largest reduction comes first.
| 2027 plan | Brand | Monthly reduction |
|---|---|---|
| AARP Medicare Advantage Patriot No Rx ID-MA01H4604-019 | UnitedHealthcare | $165 |
| Humana USAA Honor GivebackH5216-427 | Humana | $150 best in its area |
| PacificSource Medicare Idaho BasicH3864-050 | PacificSource Medicare | $60 |
| Secure Blue CourageH1302-004 | Blue Cross of Idaho | $45 |
| Humana USAA Honor GivebackH5216-455 | Humana | $43 |
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 Idaho counties have no Medicare Advantage plan open to everyone in 2027?
5 counties in Idaho 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.
Benewah, ID
No Medicare Advantage plan open to everyone is sold in Benewah, Idaho for 2027. 9 plans were sold here in 2026; 5 of them leave, and the 5 plans sold for 2027 are special needs plans. People here can use Original Medicare with one of the 8 stand-alone drug plans offered in Idaho.
Butte, ID
No Medicare Advantage plan open to everyone is sold in Butte, Idaho for 2027. 2 plans were sold here in 2026; 1 of them leave, and the 4 plans sold for 2027 are special needs plans. People here can use Original Medicare with one of the 8 stand-alone drug plans offered in Idaho.
Idaho, ID
No Medicare Advantage plan open to everyone is sold in Idaho, Idaho for 2027. 10 plans were sold here in 2026; 6 of them leave, and the 5 plans sold for 2027 are special needs plans. People here can use Original Medicare with one of the 8 stand-alone drug plans offered in Idaho.
Lemhi, ID
No Medicare Advantage plan open to everyone is sold in Lemhi, Idaho for 2027. 4 plans were sold here in 2026; 4 of them leave, and the 3 plans sold for 2027 are special needs plans. People here can use Original Medicare with one of the 8 stand-alone drug plans offered in Idaho.
Lewis, ID
No Medicare Advantage plan open to everyone is sold in Lewis, Idaho for 2027. 7 plans were sold here in 2026; 5 of them leave, and the 5 plans sold for 2027 are special needs plans. People here can use Original Medicare with one of the 8 stand-alone drug plans offered in Idaho.
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).
191,994 of Idaho's 419,106 people with Medicare were in a Medicare Advantage plan in September 2026 (46%).
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