Medicare Advantage in Greene County, Iowa
909 people in Greene County, Iowa were enrolled in Medicare Advantage in October 2026, 36.0% of 2,527 eligible beneficiaries (−0.5 pts since October 2025). CVS Health Corporation is the largest parent organization with 45% of reported enrollment; 6 parent organizations have 11 or more members and the HHI is 2,911 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 535 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 16.
Parent organizations in Greene County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 395 | +72 | 44.9% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 174 | +53 | 19.8% |
| Humana Inc. | 155 | +83 | 17.6% |
| UnitedHealth Group, Inc. | 120 | −221 | 13.6% |
| Centene Corporation | 23 | new | 2.6% |
| Elevance Health, Inc. | 13 | −5 | 1.5% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 411 beneficiaries in Greene County were assigned to 11 Medicare Shared Savings Program ACOs, 33.2% 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.