Medicare Advantage in Bon Homme County, South Dakota
605 people in Bon Homme County, South Dakota were enrolled in Medicare Advantage in October 2026, 36.2% of 1,673 eligible beneficiaries (−0.7 pts since October 2025). Medica Holding Company is the largest parent organization with 60% of reported enrollment; 5 parent organizations have 11 or more members and the HHI is 4,017 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 111 members here are in plans that terminate or leave the county, and Blue Cross Blue Shield of Michigan Mutual Ins. Co., CVS Health Corporation leave. MA plans offered go from 14 to 7.
Parent organizations in Bon Homme County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Medica Holding Company | 360 | +112 | 59.7% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 84 | −16 | 13.9% |
| UnitedHealth Group, Inc. | 77 | −20 | 12.8% |
| CVS Health Corporation | 49 | −75 | 8.1% |
| Sanford Health | 33 | +4 | 5.5% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 379 beneficiaries in Bon Homme County were assigned to 9 Medicare Shared Savings Program ACOs, 44.5% of assignable Original Medicare beneficiaries. Together, roughly 65% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.