Medicare Advantage in Adams County, Colorado
47,338 people in Adams County, Colorado were enrolled in Medicare Advantage in October 2026, 64.3% of 73,568 eligible beneficiaries (−0.2 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 43% of reported enrollment; 14 parent organizations have 11 or more members and the HHI is 3,025 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 3,378 members here are in plans that terminate or leave the county. MA plans offered go from 43 to 36.
Parent organizations in Adams County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 20,273 | −412 | 43.0% |
| Kaiser Foundation Health Plan, Inc. | 14,699 | +285 | 31.1% |
| Humana Inc. | 6,176 | +1,805 | 13.1% |
| Devoted Health, Inc. | 2,081 | +841 | 4.4% |
| CVS Health Corporation | 1,728 | −326 | 3.7% |
| Total Community Options, Inc. | 570 | +18 | 1.2% |
| Intermountain Health Care, Inc. | 545 | +123 | 1.2% |
| Denver Health and Hospital Authority | 372 | +11 | 0.8% |
| Elevance Health, Inc. | 350 | +56 | 0.7% |
| Health Care Service Corporation | 317 | −777 | 0.7% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 35 | −6 | under 0.1% |
| California Physicians' Service | 17 | +1 | under 0.1% |
| Perennial Consortium, LLC | 14 | new | under 0.1% |
| TRU Community Care | 11 | 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, 7,744 beneficiaries in Adams County were assigned to 109 Medicare Shared Savings Program ACOs, 55.6% of assignable Original Medicare beneficiaries. Together, roughly 84% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.