Medicare Advantage in Tulsa County, Oklahoma
67,456 people in Tulsa County, Oklahoma were enrolled in Medicare Advantage in October 2026, 53.3% of 126,605 eligible beneficiaries (+0.7 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 35% of reported enrollment; 13 parent organizations have 11 or more members and the HHI is 2,754 (highly concentrated). For 2027, 799 members here are in plans that terminate or leave the county, and Health Care Service Corporation, Centene Corporation leave. MA plans offered go from 38 to 32.
Parent organizations in Tulsa County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 23,832 | −4,509 | 35.4% |
| St Francis Health System & St John Health System | 22,109 | +802 | 32.9% |
| Humana Inc. | 13,085 | +5,053 | 19.4% |
| MHH Healthcare, L.P. | 3,153 | +300 | 4.7% |
| CVS Health Corporation | 2,687 | −382 | 4.0% |
| Devoted Health, Inc. | 895 | new | 1.3% |
| Health Care Service Corporation | 832 | −40 | 1.2% |
| Centene Corporation | 278 | −246 | 0.4% |
| LIFE Senior Services, Inc. | 256 | +31 | 0.4% |
| Elevance Health, Inc. | 66 | +11 | under 0.1% |
| Mitchell Family Office | 60 | new | under 0.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 19 | −6 | under 0.1% |
| California Physicians' Service | 14 | 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, 26,822 beneficiaries in Tulsa County were assigned to 134 Medicare Shared Savings Program ACOs, 63.0% of assignable Original Medicare beneficiaries. Together, roughly 83% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.