Medicare Advantage in Sebastian County, Arkansas
14,512 people in Sebastian County, Arkansas were enrolled in Medicare Advantage in October 2026, 50.2% of 28,933 eligible beneficiaries (+0.3 pts since October 2025). Humana Inc. is the largest parent organization with 46% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 3,275 (highly concentrated). For 2027, 252 members here are in plans that terminate or leave the county. MA plans offered go from 35 to 40.
Parent organizations in Sebastian County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 6,699 | +2,045 | 46.4% |
| UnitedHealth Group, Inc. | 4,383 | −280 | 30.3% |
| CVS Health Corporation | 1,816 | −1,069 | 12.6% |
| USAble Mutual Insurance Company | 847 | −300 | 5.9% |
| Centene Corporation | 413 | −91 | 2.9% |
| Health Care Service Corporation | 193 | +12 | 1.3% |
| Select Founders, LLC | 82 | +16 | 0.6% |
| Elevance Health, Inc. | 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, 8,947 beneficiaries in Sebastian County were assigned to 53 Medicare Shared Savings Program ACOs, 84.4% of assignable Original Medicare beneficiaries. Together, roughly 92% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.