Medicare Advantage in Arapahoe County, Colorado
62,746 people in Arapahoe County, Colorado were enrolled in Medicare Advantage in October 2026, 57.6% of 108,919 eligible beneficiaries (−0.6 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 43% of reported enrollment; 15 parent organizations have 11 or more members and the HHI is 3,068 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 3,930 members here are in plans that terminate or leave the county. MA plans offered go from 40 to 33.
Parent organizations in Arapahoe County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 27,082 | −1,549 | 43.3% |
| Kaiser Foundation Health Plan, Inc. | 18,699 | +289 | 29.9% |
| Humana Inc. | 10,331 | +3,200 | 16.5% |
| Devoted Health, Inc. | 2,294 | +626 | 3.7% |
| CVS Health Corporation | 2,278 | −543 | 3.6% |
| Intermountain Health Care, Inc. | 433 | +64 | 0.7% |
| Total Community Options, Inc. | 398 | 0 | 0.6% |
| Denver Health and Hospital Authority | 300 | +26 | 0.5% |
| Elevance Health, Inc. | 256 | −200 | 0.4% |
| Health Care Service Corporation | 256 | −957 | 0.4% |
| Longevity Health Founders, LLC | 74 | −8 | 0.1% |
| Perennial Consortium, LLC | 63 | +25 | 0.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 59 | −5 | under 0.1% |
| Hospice of Metro Denver, Inc | 25 | +9 | under 0.1% |
| California Physicians' Service | 17 | +1 | 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, 14,852 beneficiaries in Arapahoe County were assigned to 166 Medicare Shared Savings Program ACOs, 53.1% of assignable Original Medicare beneficiaries. Together, roughly 80% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.