Medicare Advantage in Elmore County, Idaho
2,570 people in Elmore County, Idaho were enrolled in Medicare Advantage in October 2026, 45.5% of 5,648 eligible beneficiaries (−1.9 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 31% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 1,971 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 1,573 members here are in plans that terminate or leave the county, and Trinity Health Corporation leaves. MA plans offered go from 17 to 11.
Parent organizations in Elmore County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 786 | −341 | 30.9% |
| PacificSource | 512 | +412 | 20.1% |
| Humana Inc. | 388 | +22 | 15.3% |
| Trinity Health Corporation | 363 | +296 | 14.3% |
| Molina Healthcare, Inc. | 290 | −13 | 11.4% |
| Gemstone Holdings, Inc. | 166 | −403 | 6.5% |
| CVS Health Corporation | 39 | −2 | 1.5% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 406 beneficiaries in Elmore County were assigned to 19 Medicare Shared Savings Program ACOs, 22.0% of assignable Original Medicare beneficiaries. Together, roughly 57% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.