Medicare Advantage in Roberts County, South Dakota
774 people in Roberts County, South Dakota were enrolled in Medicare Advantage in October 2026, 32.6% of 2,373 eligible beneficiaries (−2.6 pts since October 2025). Medica Holding Company is the largest parent organization with 56% of reported enrollment; 4 parent organizations have 11 or more members and the HHI is 3,835 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 383 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 9 to 7.
Parent organizations in Roberts County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Medica Holding Company | 424 | +12 | 55.9% |
| Sanford Health | 139 | +26 | 18.3% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 131 | −12 | 17.3% |
| UnitedHealth Group, Inc. | 64 | −46 | 8.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 238 beneficiaries in Roberts County were assigned to 12 Medicare Shared Savings Program ACOs, 24.1% of assignable Original Medicare beneficiaries. Together, roughly 49% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.