Medicare Advantage in Mercer County, Pennsylvania
21,265 people in Mercer County, Pennsylvania were enrolled in Medicare Advantage in October 2026, 69.4% of 30,621 eligible beneficiaries (+0.4 pts since October 2025). CVS Health Corporation is the largest parent organization with 39% of reported enrollment; 12 parent organizations have 11 or more members and the HHI is 2,716 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 750 members here are in plans that terminate or leave the county, and Health Care Service Corporation leaves. MA plans offered go from 62 to 55.
Parent organizations in Mercer County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 8,320 | +175 | 39.2% |
| UPMC Health System | 5,253 | +58 | 24.8% |
| Highmark Health | 4,646 | −35 | 21.9% |
| UnitedHealth Group, Inc. | 1,850 | −40 | 8.7% |
| Humana Inc. | 590 | +72 | 2.8% |
| One Senior Care, Inc. | 114 | +14 | 0.5% |
| Centene Corporation | 110 | −16 | 0.5% |
| Health Care Service Corporation | 99 | +10 | 0.5% |
| Devoted Health, Inc. | 86 | new | 0.4% |
| Rifkin Managed Care Holding, LLC | 71 | +3 | 0.3% |
| Independence Health Group, Inc. | 60 | −4 | 0.3% |
| Elevance Health, Inc. | 15 | +2 | 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, 2,414 beneficiaries in Mercer County were assigned to 44 Medicare Shared Savings Program ACOs, 31.6% of assignable Original Medicare beneficiaries. Together, roughly 79% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.