Medicare Advantage in St. Charles, Louisiana
8,052 people in St. Charles, Louisiana were enrolled in Medicare Advantage in October 2026, 74.5% of 10,810 eligible beneficiaries (−0.2 pts since October 2025). Humana Inc. is the largest parent organization with 56% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 4,406 (highly concentrated). For 2027, 587 members here are in plans that terminate or leave the county. MA plans offered go from 33 to 32.
Parent organizations in St. Charles
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 4,485 | +417 | 55.8% |
| UnitedHealth Group, Inc. | 2,844 | −37 | 35.4% |
| CVS Health Corporation | 441 | −24 | 5.5% |
| Louisiana Health Service & Indemnity Company | 148 | +10 | 1.8% |
| Devoted Health, Inc. | 47 | new | 0.6% |
| Centene Corporation | 36 | −3 | 0.4% |
| Elevance Health, Inc. | 31 | +7 | 0.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 919 beneficiaries in St. Charles were assigned to 19 Medicare Shared Savings Program ACOs, 58.5% of assignable Original Medicare beneficiaries. Together, roughly 89% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.