Medicare Advantage in Brookings County, South Dakota
2,704 people in Brookings County, South Dakota were enrolled in Medicare Advantage in October 2026, 44.9% of 6,023 eligible beneficiaries (−0.8 pts since October 2025). Blue Cross Blue Shield of Michigan Mutual Ins. Co. is the largest parent organization with 42% of reported enrollment; 5 parent organizations have 11 or more members and the HHI is 3,640 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 1,430 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 12 to 12.
Parent organizations in Brookings County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 1,140 | −178 | 42.4% |
| Medica Holding Company | 1,127 | +510 | 41.9% |
| UnitedHealth Group, Inc. | 171 | −107 | 6.4% |
| CVS Health Corporation | 134 | −66 | 5.0% |
| Sanford Health | 116 | +57 | 4.3% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,981 beneficiaries in Brookings County were assigned to 17 Medicare Shared Savings Program ACOs, 71.3% of assignable Original Medicare beneficiaries. Together, roughly 84% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.