Medicare Advantage in Westchester County, New York
78,392 people in Westchester County, New York were enrolled in Medicare Advantage in October 2026, 39.1% of 200,637 eligible beneficiaries (+0.3 pts since October 2025). CVS Health Corporation is the largest parent organization with 34% of reported enrollment; 19 parent organizations have 11 or more members and the HHI is 2,108 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 7,733 members here are in plans that terminate or leave the county, and Health Care Service Corporation leaves. MA plans offered go from 38 to 30.
Parent organizations in Westchester County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 26,136 | +3,166 | 33.5% |
| UnitedHealth Group, Inc. | 19,989 | −2,546 | 25.6% |
| Healthfirst, Inc. | 10,654 | +963 | 13.6% |
| Centene Corporation | 6,006 | −445 | 7.7% |
| Elevance Health, Inc. | 5,843 | +541 | 7.5% |
| Humana Inc. | 3,086 | +1,608 | 4.0% |
| MVP Health Care, Inc. | 2,402 | −40 | 3.1% |
| EmblemHealth, Inc. | 1,235 | −21 | 1.6% |
| Visiting Nurse Service of New York | 1,057 | +486 | 1.4% |
| Elderplan, Inc. | 604 | +187 | 0.8% |
| Health Care Service Corporation | 448 | −1,469 | 0.6% |
| CenterLight Health System, Inc. | 128 | +10 | 0.2% |
| Molina Healthcare, Inc. | 90 | +16 | 0.1% |
| Catholic Health Care System | 89 | +9 | 0.1% |
| Hamaspik of Rockland County, Inc. | 85 | −2 | 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, 31,091 beneficiaries in Westchester County were assigned to 214 Medicare Shared Savings Program ACOs, 35.9% of assignable Original Medicare beneficiaries. Together, roughly 61% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.