Medicare Advantage in Cass County, North Dakota
12,073 people in Cass County, North Dakota were enrolled in Medicare Advantage in October 2026, 38.4% of 31,480 eligible beneficiaries (−1.0 pts since October 2025). Medica Holding Company is the largest parent organization with 49% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 3,091 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 3,867 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 19 to 14.
Parent organizations in Cass County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Medica Holding Company | 5,886 | +2,214 | 49.0% |
| Sanford Health | 1,943 | +480 | 16.2% |
| UnitedHealth Group, Inc. | 1,934 | +49 | 16.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 1,292 | −2,083 | 10.8% |
| CVS Health Corporation | 876 | +287 | 7.3% |
| Aware Integrated, Inc. | 40 | +12 | 0.3% |
| Northland Healthcare Alliance | 27 | +3 | 0.2% |
| Health Care Service Corporation | 15 | new | 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 2,500 beneficiaries in Cass County were assigned to 55 Medicare Shared Savings Program ACOs, 20.4% of assignable Original Medicare beneficiaries. Together, roughly 51% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.