Medicare Advantage in Sac County, Iowa
448 people in Sac County, Iowa were enrolled in Medicare Advantage in October 2026, 16.7% of 2,679 eligible beneficiaries (−0.03 pts since October 2025). CVS Health Corporation is the largest parent organization with 37% of reported enrollment; 5 parent organizations have 11 or more members and the HHI is 2,644 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 199 members here are in plans that terminate or leave the county, and Blue Cross Blue Shield of Michigan Mutual Ins. Co. leaves. MA plans offered go from 17 to 12.
Parent organizations in Sac County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 156 | +55 | 37.1% |
| UnitedHealth Group, Inc. | 106 | −87 | 25.2% |
| Humana Inc. | 89 | +7 | 21.2% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 54 | +25 | 12.9% |
| Mitchell Family Office | 15 | +1 | 3.6% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 192 beneficiaries in Sac County were assigned to 15 Medicare Shared Savings Program ACOs, 10.0% of assignable Original Medicare beneficiaries. Together, roughly 25% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.