Medicare plan changes in Idaho for 2027
Across 44 counties in Idaho, the 2027 CMS file lists 172 county listings of Medicare Advantage plans with drug coverage, compared with 269 in 2026. By our count, 5 counties have none in 2027, including counties that do not appear in the CMS file at all.
Before you choose a plan
Compare plans for your ZIP code, drugs and doctors on the official Medicare Plan Finder, or call 1-800-MEDICARE (1-800-633-4227). Free, unbiased counselling is available from your State Health Insurance Assistance Program at shiphelp.org.
By county
| County | 2026 plans | 2027 plans | Change | Companies leaving |
|---|---|---|---|---|
| Ada County | 16 | 13 | -3 | Trinity Health Corporation |
| Adams County | 6 | 2 | -4 | Trinity Health Corporation, UnitedHealth Group, Inc. |
| Bannock County | 6 | 4 | -2 | UnitedHealth Group, Inc. |
| Bear Lake County | 4 | 2 | -2 | UnitedHealth Group, Inc. |
| Benewah County | 2 | 0 | -2 | UnitedHealth Group, Inc. |
| Bingham County | 6 | 3 | -3 | UnitedHealth Group, Inc. |
| Blaine County | 4 | 1 | -3 | Humana Inc., UnitedHealth Group, Inc. |
| Boise County | 14 | 9 | -5 | PacificSource, Trinity Health Corporation |
| Bonner County | 5 | 4 | -1 | PacificSource |
| Bonneville County | 6 | 6 | +0 | None |
| Boundary County | 3 | 2 | -1 | None |
| Butte County | 0 | 0 | +0 | None |
| Camas County | 5 | 3 | -2 | PacificSource |
| Canyon County | 16 | 13 | -3 | Trinity Health Corporation |
| Caribou County | 4 | 2 | -2 | UnitedHealth Group, Inc. |
| Cassia County | 5 | 1 | -4 | Humana Inc., UnitedHealth Group, Inc. |
| Clark County | 4 | 4 | +0 | None |
| Clearwater County | 2 | 2 | +0 | None |
| Custer County | 2 | 2 | +0 | None |
| Elmore County | 10 | 6 | -4 | Trinity Health Corporation, UnitedHealth Group, Inc. |
| Franklin County | 4 | 2 | -2 | UnitedHealth Group, Inc. |
| Fremont County | 5 | 5 | +0 | None |
| Gem County | 14 | 9 | -5 | PacificSource, Trinity Health Corporation |
| Gooding County | 6 | 4 | -2 | Humana Inc. |
| Idaho County | 3 | 0 | -3 | UnitedHealth Group, Inc. |
| Jefferson County | 6 | 6 | +0 | None |
| Jerome County | 6 | 3 | -3 | Humana Inc., UnitedHealth Group, Inc. |
| Kootenai County | 5 | 4 | -1 | PacificSource |
| Latah County | 3 | 1 | -2 | UnitedHealth Group, Inc. |
| Lemhi County | 2 | 0 | -2 | UnitedHealth Group, Inc. |
| Lewis County | 2 | 0 | -2 | UnitedHealth Group, Inc. |
| Lincoln County | 5 | 2 | -3 | Humana Inc., PacificSource |
| Madison County | 5 | 4 | -1 | None |
| Minidoka County | 5 | 1 | -4 | Humana Inc., UnitedHealth Group, Inc. |
| Nez Perce County | 3 | 1 | -2 | UnitedHealth Group, Inc. |
| Oneida County | 4 | 4 | +0 | None |
| Owyhee County | 14 | 9 | -5 | PacificSource, Trinity Health Corporation |
| Payette County | 14 | 10 | -4 | Trinity Health Corporation |
| Power County | 5 | 5 | +0 | None |
| Shoshone County | 4 | 3 | -1 | None |
| Teton County | 3 | 1 | -2 | UnitedHealth Group, Inc. |
| Twin Falls County | 9 | 5 | -4 | Humana Inc. |
| Valley County | 10 | 6 | -4 | Trinity Health Corporation, UnitedHealth Group, Inc. |
| Washington County | 12 | 8 | -4 | Trinity Health Corporation |
Stand-alone Part D drug plans in Idaho for 2027
8 plans in 2027, compared with 10 in 2026. Lowest monthly drug plan premium: $5.30 (2026: $0).
| Plan | Company | Monthly premium | Deductible | Star rating |
|---|---|---|---|---|
| Wellcare Value Script (PDP) | Wellcare | $5.30 | $700 | Not Applicable |
| Wellcare Classic (PDP) | Wellcare | $7.30 | $700 | Not Applicable |
| Humana Basic Rx Plan (PDP) | Humana | $30.60 | $700 | Not Applicable |
| Humana Value Rx Plan (PDP) | Humana | $34.70 | $687 | Not Applicable |
| AARP Medicare Rx Saver from UHC (PDP) | UnitedHealthcare | $92.70 | $700 | Not Applicable |
| HealthSpring Assurance Rx (PDP) | HealthSpring | $94.80 | $700 | Not Applicable |
| Humana Premier Rx Plan (PDP) | Humana | $134.00 | $350 | Not Applicable |
| AARP Medicare Rx Preferred from UHC (PDP) | UnitedHealthcare | $238.00 | $300 | Not Applicable |
Sources
- Centers for Medicare & Medicaid Services, CY2027 Medicare Advantage and Part D Landscape file (data last updated 18 October 2026)
- Centers for Medicare & Medicaid Services, CY2026 Medicare Advantage and Part D Landscape file (September 2026 release)
- US Census Bureau, 2024 Gazetteer Files, counties
Checked 29 October 2026. Plans and premiums can change before 1 January 2027. Confirm any plan on Medicare.gov before you enrol.