Medicare Advantage in Bremer County, Iowa
1,995 people in Bremer County, Iowa were enrolled in Medicare Advantage in October 2026, 33.7% of 5,917 eligible beneficiaries (−1.5 pts since October 2025). CVS Health Corporation is the largest parent organization with 42% of reported enrollment; 5 parent organizations have 11 or more members and the HHI is 3,239 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 67 members here are in plans that terminate or leave the county, and Centene Corporation leaves. MA plans offered go from 19 to 17.
Parent organizations in Bremer County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 821 | +417 | 41.7% |
| UnitedHealth Group, Inc. | 706 | −350 | 35.8% |
| Humana Inc. | 243 | +61 | 12.3% |
| Trinity Health Corporation | 157 | +132 | 8.0% |
| Centene Corporation | 44 | +28 | 2.2% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 819 beneficiaries in Bremer County were assigned to 18 Medicare Shared Savings Program ACOs, 26.4% of assignable Original Medicare beneficiaries. Together, roughly 51% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.