Medicare Advantage in Fall River County, South Dakota
766 people in Fall River County, South Dakota were enrolled in Medicare Advantage in October 2026, 26.3% of 2,909 eligible beneficiaries (−3.8 pts since October 2025). Medica Holding Company is the largest parent organization with 58% of reported enrollment; 4 parent organizations have 11 or more members and the HHI is 4,171 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 190 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 8 to 5.
Parent organizations in Fall River County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Medica Holding Company | 431 | +173 | 57.9% |
| UnitedHealth Group, Inc. | 152 | −140 | 20.4% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 150 | +11 | 20.1% |
| CVS Health Corporation | 12 | −1 | 1.6% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 724 beneficiaries in Fall River County were assigned to 22 Medicare Shared Savings Program ACOs, 53.0% 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.