Medicare Advantage in Shelby County, Iowa
811 people in Shelby County, Iowa were enrolled in Medicare Advantage in October 2026, 23.7% of 3,419 eligible beneficiaries (+0.05 pts since October 2025). CVS Health Corporation is the largest parent organization with 44% of reported enrollment; 6 parent organizations have 11 or more members and the HHI is 2,708 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 180 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 20 to 17.
Parent organizations in Shelby County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 351 | +19 | 44.2% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 161 | −1 | 20.3% |
| Humana Inc. | 90 | +15 | 11.3% |
| Centene Corporation | 89 | +35 | 11.2% |
| UnitedHealth Group, Inc. | 63 | −38 | 7.9% |
| Elevance Health, Inc. | 40 | −13 | 5.0% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,937 beneficiaries in Shelby County were assigned to 18 Medicare Shared Savings Program ACOs, 89.9% of assignable Original Medicare beneficiaries. Together, roughly 92% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.