Medicare Advantage in Webster County, Iowa
2,890 people in Webster County, Iowa were enrolled in Medicare Advantage in October 2026, 33.9% of 8,514 eligible beneficiaries (−0.9 pts since October 2025). CVS Health Corporation is the largest parent organization with 36% of reported enrollment; 5 parent organizations have 11 or more members and the HHI is 2,668 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 726 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 17 to 16.
Parent organizations in Webster County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 1,028 | +245 | 35.9% |
| UnitedHealth Group, Inc. | 697 | −460 | 24.4% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 680 | +53 | 23.8% |
| Humana Inc. | 422 | +143 | 14.8% |
| Elevance Health, Inc. | 34 | −24 | 1.2% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,581 beneficiaries in Webster County were assigned to 17 Medicare Shared Savings Program ACOs, 34.4% of assignable Original Medicare beneficiaries. Together, roughly 57% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.