Medicare Advantage in Jefferson County, New York
11,701 people in Jefferson County, New York were enrolled in Medicare Advantage in October 2026, 50.6% of 23,122 eligible beneficiaries (−0.03 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 42% of reported enrollment; 6 parent organizations have 11 or more members and the HHI is 2,671 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 3,393 members here are in plans that terminate or leave the county. MA plans offered go from 27 to 23.
Parent organizations in Jefferson County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 4,846 | −107 | 41.6% |
| Lifetime Healthcare, Inc. | 2,483 | −533 | 21.3% |
| CVS Health Corporation | 2,047 | +581 | 17.6% |
| Humana Inc. | 1,134 | +494 | 9.7% |
| Centene Corporation | 1,055 | −153 | 9.1% |
| MVP Health Care, Inc. | 84 | −6 | 0.7% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 5,876 beneficiaries in Jefferson County were assigned to 82 Medicare Shared Savings Program ACOs, 68.6% of assignable Original Medicare beneficiaries. Together, roughly 85% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.