Medicare Advantage in Yankton County, South Dakota
2,144 people in Yankton County, South Dakota were enrolled in Medicare Advantage in October 2026, 35.4% of 6,058 eligible beneficiaries (−0.9 pts since October 2025). Medica Holding Company is the largest parent organization with 70% of reported enrollment; 4 parent organizations have 11 or more members and the HHI is 5,182 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 269 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 14 to 12.
Parent organizations in Yankton County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Medica Holding Company | 1,477 | +502 | 69.7% |
| UnitedHealth Group, Inc. | 251 | −82 | 11.8% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 249 | −91 | 11.8% |
| CVS Health Corporation | 142 | −271 | 6.7% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 2,225 beneficiaries in Yankton County were assigned to 23 Medicare Shared Savings Program ACOs, 77.8% of assignable Original Medicare beneficiaries. Together, roughly 86% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.