Medicare Advantage in Barnstable County, Massachusetts
21,360 people in Barnstable County, Massachusetts were enrolled in Medicare Advantage in October 2026, 24.1% of 88,593 eligible beneficiaries (−1.1 pts since October 2025). Blue Cross and Blue Shield of Massachusetts, Inc. is the largest parent organization with 40% of reported enrollment; 14 parent organizations have 11 or more members and the HHI is 3,059 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 5,368 members here are in plans that terminate or leave the county, and Mass General Brigham Incorporated, UnitedHealth Group, Inc. leave. MA plans offered go from 18 to 16.
Parent organizations in Barnstable County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Blue Cross and Blue Shield of Massachusetts, Inc. | 8,378 | −59 | 39.5% |
| Point32Health, Inc. | 7,802 | −279 | 36.8% |
| CVS Health Corporation | 1,852 | +131 | 8.7% |
| UnitedHealth Group, Inc. | 1,479 | −501 | 7.0% |
| Fallon Community Health Plan, Inc. | 757 | +145 | 3.6% |
| CareSource | 367 | −30 | 1.7% |
| Humana Inc. | 208 | +92 | 1.0% |
| Elevance Health, Inc. | 164 | −4 | 0.8% |
| Health Care Service Corporation | 53 | new | 0.3% |
| Highmark Health | 34 | +10 | 0.2% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 31 | −39 | 0.1% |
| Mass General Brigham Incorporated | 29 | +17 | 0.1% |
| Blue Cross & Blue Shield of Rhode Island | 26 | +6 | 0.1% |
| Lifetime Healthcare, Inc. | 18 | +2 | 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, 13,793 beneficiaries in Barnstable County were assigned to 177 Medicare Shared Savings Program ACOs, 26.0% 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.