Medicare Advantage in Fremont County, Colorado
8,146 people in Fremont County, Colorado were enrolled in Medicare Advantage in October 2026, 59.5% of 13,700 eligible beneficiaries (+0.3 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 67% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 4,804 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 912 members here are in plans that terminate or leave the county. MA plans offered go from 29 to 23.
Parent organizations in Fremont County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 5,431 | −105 | 67.0% |
| Humana Inc. | 983 | +30 | 12.1% |
| Devoted Health, Inc. | 895 | +375 | 11.0% |
| CVS Health Corporation | 462 | −5 | 5.7% |
| Kaiser Foundation Health Plan, Inc. | 210 | +28 | 2.6% |
| Elevance Health, Inc. | 58 | +17 | 0.7% |
| Health Care Service Corporation | 25 | −197 | 0.3% |
| Highmark Health | 19 | new | 0.2% |
| Longevity Health Founders, LLC | 18 | new | 0.2% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 857 beneficiaries in Fremont County were assigned to 47 Medicare Shared Savings Program ACOs, 20.8% of assignable Original Medicare beneficiaries. Together, roughly 68% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.