Medicare Advantage in Seneca County, New York
5,259 people in Seneca County, New York were enrolled in Medicare Advantage in October 2026, 61.9% of 8,501 eligible beneficiaries (−0.6 pts since October 2025). Lifetime Healthcare, Inc. is the largest parent organization with 54% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 3,444 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 490 members here are in plans that terminate or leave the county. MA plans offered go from 20 to 17.
Parent organizations in Seneca County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Lifetime Healthcare, Inc. | 2,829 | +794 | 54.1% |
| UnitedHealth Group, Inc. | 768 | −1,027 | 14.7% |
| Centene Corporation | 714 | +54 | 13.7% |
| Humana Inc. | 474 | +344 | 9.1% |
| CVS Health Corporation | 205 | +6 | 3.9% |
| MVP Health Care, Inc. | 188 | −184 | 3.6% |
| Elderplan, Inc. | 48 | +5 | 0.9% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 733 beneficiaries in Seneca County were assigned to 25 Medicare Shared Savings Program ACOs, 30.9% of assignable Original Medicare beneficiaries. Together, roughly 74% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.