Medicare Advantage in Mesa County, Colorado
19,239 people in Mesa County, Colorado were enrolled in Medicare Advantage in October 2026, 45.8% of 41,970 eligible beneficiaries (−1.5 pts since October 2025). Humana Inc. is the largest parent organization with 43% of reported enrollment; 10 parent organizations have 11 or more members and the HHI is 2,912 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 4,071 members here are in plans that terminate or leave the county. MA plans offered go from 21 to 13.
Parent organizations in Mesa County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 8,282 | +2,775 | 43.3% |
| UnitedHealth Group, Inc. | 4,472 | −2,616 | 23.4% |
| CVS Health Corporation | 3,943 | −763 | 20.6% |
| Intermountain Health Care, Inc. | 1,533 | +565 | 8.0% |
| Health Care Service Corporation | 299 | −205 | 1.6% |
| Elevance Health, Inc. | 299 | +55 | 1.6% |
| Hopewest | 241 | +43 | 1.3% |
| Longevity Health Founders, LLC | 27 | −15 | 0.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 24 | −1 | 0.1% |
| UMWA Health and Retirement Funds | 23 | 0 | 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, 8,843 beneficiaries in Mesa County were assigned to 92 Medicare Shared Savings Program ACOs, 58.1% 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.