Medicare Advantage in Ottawa County, Ohio
6,872 people in Ottawa County, Ohio were enrolled in Medicare Advantage in October 2026, 52.1% of 13,183 eligible beneficiaries (−0.3 pts since October 2025). MEDICAL MUTUAL OF OHIO is the largest parent organization with 26% of reported enrollment; 13 parent organizations have 11 or more members and the HHI is 1,844 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 348 members here are in plans that terminate or leave the county, and Trinity Health Corporation leaves. MA plans offered go from 64 to 54.
Parent organizations in Ottawa County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| MEDICAL MUTUAL OF OHIO | 1,774 | +430 | 25.9% |
| CVS Health Corporation | 1,629 | +66 | 23.8% |
| UnitedHealth Group, Inc. | 1,279 | +112 | 18.7% |
| Elevance Health, Inc. | 641 | −930 | 9.4% |
| Devoted Health, Inc. | 628 | +305 | 9.2% |
| Humana Inc. | 597 | +103 | 8.7% |
| Centene Corporation | 116 | −47 | 1.7% |
| CareSource | 47 | new | 0.7% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 47 | 0 | 0.7% |
| General Catalyst Group Management Holdings LP | 35 | +14 | 0.5% |
| Trinity Health Corporation | 20 | +5 | 0.3% |
| The Schroer Group, Inc. | 12 | new | 0.2% |
| Perennial Consortium, LLC | 12 | new | 0.2% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,698 beneficiaries in Ottawa County were assigned to 52 Medicare Shared Savings Program ACOs, 35.0% of assignable Original Medicare beneficiaries. Together, roughly 69% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.