Medicare Advantage in Jerome County, Idaho
2,312 people in Jerome County, Idaho were enrolled in Medicare Advantage in October 2026, 53.8% of 4,301 eligible beneficiaries (−0.9 pts since October 2025). PacificSource is the largest parent organization with 48% of reported enrollment; 6 parent organizations have 11 or more members and the HHI is 3,751 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 1,771 members here are in plans that terminate or leave the county, and Humana Inc. leaves. MA plans offered go from 12 to 6.
Parent organizations in Jerome County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| PacificSource | 1,096 | +781 | 47.9% |
| UnitedHealth Group, Inc. | 847 | +357 | 37.1% |
| Molina Healthcare, Inc. | 158 | +22 | 6.9% |
| Gemstone Holdings, Inc. | 120 | −1,108 | 5.2% |
| Humana Inc. | 45 | −44 | 2.0% |
| Fenyx Health Holdings, Inc. | 20 | new | 0.9% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 131 beneficiaries in Jerome County were assigned to 15 Medicare Shared Savings Program ACOs, 9.4% of assignable Original Medicare beneficiaries. Together, roughly 58% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.