Medicare Advantage in Suffolk County, New York
101,430 people in Suffolk County, New York were enrolled in Medicare Advantage in October 2026, 29.9% of 339,629 eligible beneficiaries (+0.3 pts since October 2025). CVS Health Corporation is the largest parent organization with 43% of reported enrollment; 14 parent organizations have 11 or more members and the HHI is 2,404 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 20,963 members here are in plans that terminate or leave the county, and Health Care Service Corporation leaves. MA plans offered go from 27 to 18.
Parent organizations in Suffolk County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 43,248 | +9,741 | 42.8% |
| Humana Inc. | 13,281 | +2,450 | 13.1% |
| Centene Corporation | 11,732 | −240 | 11.6% |
| Elevance Health, Inc. | 11,710 | +1,264 | 11.6% |
| UnitedHealth Group, Inc. | 9,945 | −3,828 | 9.8% |
| EmblemHealth, Inc. | 3,718 | +34 | 3.7% |
| Healthfirst, Inc. | 3,611 | −243 | 3.6% |
| Visiting Nurse Service of New York | 2,502 | +1,302 | 2.5% |
| Health Care Service Corporation | 909 | −6,658 | 0.9% |
| Elderplan, Inc. | 148 | +13 | 0.1% |
| CenterLight Health System, Inc. | 107 | −3 | 0.1% |
| Longevity Health Founders, LLC | 78 | +9 | under 0.1% |
| NY Hotel Trades Council&Hotel Assn of NYC | 51 | +1 | under 0.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 12 | 0 | 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, 56,410 beneficiaries in Suffolk County were assigned to 233 Medicare Shared Savings Program ACOs, 31.4% of assignable Original Medicare beneficiaries. Together, roughly 52% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.