Medicare Advantage in Hamilton County, Ohio
93,871 people in Hamilton County, Ohio were enrolled in Medicare Advantage in October 2026, 56.8% of 165,148 eligible beneficiaries (−1.2 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 25% of reported enrollment; 16 parent organizations have 11 or more members and the HHI is 1,829 (highly concentrated). For 2027, 12,374 members here are in plans that terminate or leave the county. MA plans offered go from 62 to 55.
Parent organizations in Hamilton County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 23,038 | −2,334 | 24.6% |
| Humana Inc. | 22,557 | +4,586 | 24.1% |
| Elevance Health, Inc. | 16,618 | −5,272 | 17.8% |
| CVS Health Corporation | 15,827 | +322 | 16.9% |
| Health Care Service Corporation | 3,488 | +2,417 | 3.7% |
| Molina Healthcare, Inc. | 2,934 | +71 | 3.1% |
| Devoted Health, Inc. | 2,465 | +980 | 2.6% |
| Trinity Health Corporation | 1,872 | +514 | 2.0% |
| MEDICAL MUTUAL OF OHIO | 1,765 | −1,595 | 1.9% |
| CareSource | 1,432 | +1,082 | 1.5% |
| Centene Corporation | 721 | −342 | 0.8% |
| SNP Holdings, LLC | 533 | +9 | 0.6% |
| The Schroer Group, Inc. | 163 | +65 | 0.2% |
| Perennial Consortium, LLC | 86 | +41 | under 0.1% |
| TriHealth, Inc. | 50 | new | under 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 10,029 beneficiaries in Hamilton County were assigned to 145 Medicare Shared Savings Program ACOs, 20.7% of assignable Original Medicare beneficiaries. Together, roughly 66% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.