Medicare Advantage in Dukes County, Massachusetts
503 people in Dukes County, Massachusetts were enrolled in Medicare Advantage in October 2026, 8.7% of 5,779 eligible beneficiaries (+0.5 pts since October 2025). Mass General Brigham Incorporated is the largest parent organization with 51% of reported enrollment; 5 parent organizations have 11 or more members and the HHI is 3,348 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 211 members here are in plans that terminate or leave the county. MA plans offered go from 9 to 8.
Parent organizations in Dukes County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Mass General Brigham Incorporated | 240 | +50 | 51.0% |
| CVS Health Corporation | 95 | +4 | 20.2% |
| Humana Inc. | 63 | +6 | 13.4% |
| UnitedHealth Group, Inc. | 59 | −28 | 12.5% |
| Elevance Health, Inc. | 14 | 0 | 3.0% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 3,496 beneficiaries in Dukes County were assigned to 46 Medicare Shared Savings Program ACOs, 78.3% of assignable Original Medicare beneficiaries. Together, roughly 80% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.