Medicare Advantage in O'Brien County, Iowa
620 people in O'Brien County, Iowa were enrolled in Medicare Advantage in October 2026, 17.5% of 3,546 eligible beneficiaries (−0.9 pts since October 2025). Blue Cross Blue Shield of Michigan Mutual Ins. Co. is the largest parent organization with 34% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 2,335 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 250 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 15 to 13.
Parent organizations in O'Brien County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 203 | +53 | 33.7% |
| CVS Health Corporation | 179 | −88 | 29.7% |
| UnitedHealth Group, Inc. | 75 | −31 | 12.4% |
| Sanford Health | 54 | +20 | 9.0% |
| Humana Inc. | 44 | +9 | 7.3% |
| Centene Corporation | 28 | new | 4.6% |
| Medica Holding Company | 20 | +4 | 3.3% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 643 beneficiaries in O'Brien County were assigned to 14 Medicare Shared Savings Program ACOs, 26.9% of assignable Original Medicare beneficiaries. Together, roughly 40% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.