Patient Advocacy Without the Call Center
The data layer behind our Idaho guide and all 56 city pages, in one place: CMS enrollment, Census demographics, and federal shortage designations, county by county.
Coverage data 2023-2024. Plan networks change - we confirm exactly what your plan covers before any work begins.
The 37 of Idaho's 44 counties that our city pages cover, with 398,495 beneficiaries. Each county links to its anchor city page.
| County or city | Medicare beneficiaries | Medicare Advantage share | Dual-eligible | Residents 65+ | Shortage designations |
|---|---|---|---|---|---|
| Ada County | 103,615 | 58.3% | 10,159 | 79,976 | 0 |
| Canyon County | 48,157 | 63.9% | 7,642 | 34,795 | 1 |
| Kootenai County | 47,426 | 45.3% | 5,050 | 35,003 | 2 |
| Bonneville County | 22,281 | 48.3% | 3,464 | 17,345 | 2 |
| Twin Falls County | 19,137 | 57.8% | 3,045 | 15,135 | 1 |
| Bannock County | 17,662 | 53.5% | 3,041 | 13,244 | 1 |
| Bonner County | 15,513 | 42.7% | 1,564 | 12,932 | 1 |
| Nez Perce County | 11,037 | 38.5% | 1,673 | 8,733 | 1 |
| Bingham County | 9,329 | 51% | 1,463 | 7,258 | 1 |
| Latah County | 7,540 | 31.1% | 839 | 5,834 | 1 |
| Payette County | 6,532 | 57.1% | 1,025 | 5,048 | 1 |
| Blaine County | 6,218 | 27.9% | 330 | 5,366 | 1 |
| Gem County | 5,727 | 62.7% | 747 | 4,512 | 2 |
| Idaho County | 5,567 | 16% | 703 | 4,895 | 1 |
| Elmore County | 5,512 | 46.7% | 949 | 4,120 | 1 |
| Jefferson County | 5,182 | 49.4% | 567 | 3,717 | 1 |
| Cassia County | 4,581 | 42.7% | 770 | 3,450 | 1 |
| Minidoka County | 4,475 | 47.9% | 724 | 3,443 | 1 |
| Jerome County | 4,166 | 54.2% | 692 | 3,303 | 1 |
| Boundary County | 4,086 | 42.8% | 472 | 2,990 | 1 |
| Shoshone County | 4,022 | 34.4% | 774 | 3,092 | 1 |
| Madison County | 3,972 | 45.7% | 470 | 2,849 | 1 |
| Valley County | 3,544 | 46.8% | 230 | 3,220 | 2 |
| Gooding County | 3,464 | 50.5% | 609 | 2,860 | 1 |
| Washington County | 3,427 | 50.3% | 510 | 2,790 | 1 |
| Benewah County | 3,198 | 14.4% | 550 | 2,325 | 1 |
| Clearwater County | 3,051 | 13.8% | 393 | 2,544 | 1 |
| Lemhi County | 2,965 | 9.7% | 357 | 2,485 | 1 |
| Fremont County | 2,866 | 39.4% | 352 | 2,438 | 1 |
| Franklin County | 2,739 | 41.4% | 254 | 2,079 | 1 |
| Owyhee County | 2,642 | 58.4% | 479 | 2,347 | 1 |
| Teton County | 2,057 | 13.1% | 112 | 1,631 | 1 |
| Bear Lake County | 1,632 | 12.9% | 174 | 1,368 | 1 |
| Power County | 1,542 | 42.7% | 225 | 1,255 | 1 |
| Caribou County | 1,514 | 20% | 119 | 1,277 | 1 |
| Oneida County | 1,146 | 22.3% | 120 | 911 | 1 |
| Lincoln County | 971 | 46.5% | 158 | 817 | 1 |
Statewide, 49.9% of beneficiaries chose Medicare Advantage in 2025. Counties above that line see more prior authorizations and more denials worth appealing; counties below it lean on Medigap, where Idaho adds a yearly birthday rule: for 63 days beginning on their birthday, a Medigap policyholder can buy a policy with comparable or lesser benefits from any insurer without health questions, and policies issued after February 28, 2022 are community rated, so premiums are not based on age. People under 65 on Medicare through disability also get a six-month Medigap open enrollment when their Part B begins. About 8.3% of Idaho seniors live below the poverty line, the group most likely to qualify for unclaimed help: Extra Help and Idaho's Medicare Savings Programs, which the Department of Health and Welfare decides with an income and resource test. For the full rundown, sources included, see our Idaho patient advocacy hub.
One dedicated advocate for the bills, appeals, appointments, and paperwork, serving all 44 Idaho counties virtually, usually at $0 with Medicare.
Or start from your city: every Idaho city we serve.
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Read moreSources: CMS Medicare Monthly Enrollment (2025); US Census Bureau ACS 2023 5-year; CMS Care Compare Timely & Effective Care (median ER minutes, period ending 09/30/2025); HRSA Health Professional Shortage Area designation file. Data retrieved 2026-10-07. Understood Care is an independent private advocacy service, not a government agency.