Medicare Advantage in Middlesex County, New Jersey
65,862 people in Middlesex County, New Jersey were enrolled in Medicare Advantage in October 2026, 41.2% of 159,785 eligible beneficiaries (+0.3 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 36% of reported enrollment; 14 parent organizations have 11 or more members and the HHI is 2,469 (highly concentrated). For 2027, 7,465 members here are in plans that terminate or leave the county, and Independence Health Group, Inc. leaves. MA plans offered go from 38 to 31.
Parent organizations in Middlesex County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 23,295 | −2,479 | 35.5% |
| CVS Health Corporation | 16,734 | +536 | 25.5% |
| Clover Health Holdings, Inc. | 14,533 | +6,519 | 22.1% |
| Horizon Mutual Holdings, Inc | 3,913 | −3,784 | 6.0% |
| Humana Inc. | 3,008 | +1,574 | 4.6% |
| Elevance Health, Inc. | 1,746 | +76 | 2.7% |
| Centene Corporation | 1,590 | −194 | 2.4% |
| Independence Health Group, Inc. | 635 | −32 | 1.0% |
| Longevity Health Founders, LLC | 100 | −2 | 0.2% |
| NY Hotel Trades Council&Hotel Assn of NYC | 33 | −1 | under 0.1% |
| EmblemHealth, Inc. | 23 | +3 | under 0.1% |
| Health Care Service Corporation | 19 | −6 | under 0.1% |
| Healthfirst, Inc. | 14 | −4 | under 0.1% |
| BoldAge PACE, LLC | 11 | new | 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, 30,886 beneficiaries in Middlesex County were assigned to 160 Medicare Shared Savings Program ACOs, 48.1% of assignable Original Medicare beneficiaries. Together, roughly 70% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.