Medicare Advantage in St. Mary, Louisiana
7,243 people in St. Mary, Louisiana were enrolled in Medicare Advantage in October 2026, 61.5% of 11,775 eligible beneficiaries (+0.6 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 51% of reported enrollment; 6 parent organizations have 11 or more members and the HHI is 3,508 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 1,772 members here are in plans that terminate or leave the county. MA plans offered go from 28 to 24.
Parent organizations in St. Mary
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 3,701 | −39 | 51.2% |
| Humana Inc. | 1,839 | +267 | 25.5% |
| Louisiana Health Service & Indemnity Company | 907 | +37 | 12.6% |
| CVS Health Corporation | 630 | −120 | 8.7% |
| Centene Corporation | 99 | −14 | 1.4% |
| Elevance Health, Inc. | 49 | +26 | 0.7% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,356 beneficiaries in St. Mary were assigned to 15 Medicare Shared Savings Program ACOs, 40.5% of assignable Original Medicare beneficiaries. Together, roughly 77% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.