Medicare Advantage in Sullivan County, New York
7,056 people in Sullivan County, New York were enrolled in Medicare Advantage in October 2026, 37.7% of 18,720 eligible beneficiaries (+1.0 pts since October 2025). CVS Health Corporation is the largest parent organization with 30% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 2,084 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 1,186 members here are in plans that terminate or leave the county. MA plans offered go from 25 to 21.
Parent organizations in Sullivan County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 2,073 | +253 | 29.7% |
| UnitedHealth Group, Inc. | 1,823 | −215 | 26.1% |
| Humana Inc. | 1,131 | +420 | 16.2% |
| MVP Health Care, Inc. | 901 | −180 | 12.9% |
| Centene Corporation | 617 | −91 | 8.8% |
| Healthfirst, Inc. | 254 | +73 | 3.6% |
| Elevance Health, Inc. | 86 | +5 | 1.2% |
| Hamaspik of Rockland County, Inc. | 80 | +19 | 1.1% |
| EmblemHealth, Inc. | 21 | +6 | 0.3% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 957 beneficiaries in Sullivan County were assigned to 89 Medicare Shared Savings Program ACOs, 10.5% of assignable Original Medicare beneficiaries. Together, roughly 44% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.