Medicare Advantage in Canyon County, Idaho
31,301 people in Canyon County, Idaho were enrolled in Medicare Advantage in October 2026, 62.9% of 49,740 eligible beneficiaries (−2.3 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 36% of reported enrollment; 12 parent organizations have 11 or more members and the HHI is 2,396 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 10,040 members here are in plans that terminate or leave the county, and Trinity Health Corporation leaves. MA plans offered go from 23 to 19.
Parent organizations in Canyon County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 11,167 | −2,289 | 35.8% |
| Trinity Health Corporation | 7,991 | +6,609 | 25.6% |
| Gemstone Holdings, Inc. | 4,902 | −5,630 | 15.7% |
| Humana Inc. | 4,050 | +1,979 | 13.0% |
| Molina Healthcare, Inc. | 1,839 | −293 | 5.9% |
| PacificSource | 610 | +259 | 2.0% |
| CVS Health Corporation | 206 | +16 | 0.7% |
| Elevance Health, Inc. | 147 | +5 | 0.5% |
| Mitchell Family Office | 109 | +55 | 0.3% |
| California Physicians' Service | 74 | +4 | 0.2% |
| Cambia Health Solutions, Inc. | 39 | −573 | 0.1% |
| Fenyx Health Holdings, Inc. | 36 | new | 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 3,263 beneficiaries in Canyon County were assigned to 74 Medicare Shared Savings Program ACOs, 31.6% of assignable Original Medicare beneficiaries. Together, roughly 75% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.