Medicare Advantage in Limestone County, Alabama
11,731 people in Limestone County, Alabama were enrolled in Medicare Advantage in October 2026, 52.3% of 22,438 eligible beneficiaries (+0.6 pts since October 2025). Humana Inc. is the largest parent organization with 38% of reported enrollment; 11 parent organizations have 11 or more members and the HHI is 2,136 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 389 members here are in plans that terminate or leave the county. MA plans offered go from 36 to 39.
Parent organizations in Limestone County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 4,452 | +1,946 | 38.0% |
| UnitedHealth Group, Inc. | 1,918 | −1,246 | 16.4% |
| BlueCross BlueShield of Alabama | 1,869 | +42 | 16.0% |
| Health Care Service Corporation | 917 | −119 | 7.8% |
| CVS Health Corporation | 706 | −289 | 6.0% |
| Devoted Health, Inc. | 597 | +277 | 5.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 539 | −11 | 4.6% |
| Triton Health Systems, L.L.C. | 495 | +10 | 4.2% |
| Highmark Health | 127 | −2 | 1.1% |
| Elevance Health, Inc. | 49 | −1 | 0.4% |
| Associated Care Ventures, Inc. | 33 | −5 | 0.3% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 3,759 beneficiaries in Limestone County were assigned to 66 Medicare Shared Savings Program ACOs, 48.8% of assignable Original Medicare beneficiaries. Together, roughly 76% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.