Medicare Advantage in Sioux County, North Dakota
108 people in Sioux County, North Dakota were enrolled in Medicare Advantage in October 2026, 21.5% of 502 eligible beneficiaries (−0.1 pts since October 2025). CVS Health Corporation is the largest parent organization with 60% of reported enrollment; 3 parent organizations have 11 or more members and the HHI is 4,544 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 0 members here are in plans that terminate or leave the county. MA plans offered go from 13 to 9.
Parent organizations in Sioux County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 64 | +1 | 60.4% |
| Medica Holding Company | 29 | +12 | 27.4% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 13 | −8 | 12.3% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 28 beneficiaries in Sioux County were assigned to 4 Medicare Shared Savings Program ACOs, 16.9% of assignable Original Medicare beneficiaries. Together, roughly 35% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.