Medicare Advantage in Clark County, Washington
73,727 people in Clark County, Washington were enrolled in Medicare Advantage in October 2026, 67.7% of 108,847 eligible beneficiaries (−0.4 pts since October 2025). Kaiser Foundation Health Plan, Inc. is the largest parent organization with 30% of reported enrollment; 15 parent organizations have 11 or more members and the HHI is 2,369 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 10,850 members here are in plans that terminate or leave the county, and Providence St Joseph Health, Health Care Service Corporation, Elevance Health, Inc. leave. MA plans offered go from 45 to 31.
Parent organizations in Clark County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Kaiser Foundation Health Plan, Inc. | 22,053 | +437 | 30.0% |
| Humana Inc. | 19,662 | +6,402 | 26.7% |
| UnitedHealth Group, Inc. | 18,595 | −3,001 | 25.3% |
| Cambia Health Solutions, Inc. | 7,491 | −970 | 10.2% |
| Providence St Joseph Health | 1,940 | −470 | 2.6% |
| Devoted Health, Inc. | 1,543 | +1,149 | 2.1% |
| Molina Healthcare, Inc. | 610 | −109 | 0.8% |
| Centene Corporation | 494 | −72 | 0.7% |
| CVS Health Corporation | 471 | +15 | 0.6% |
| Elevance Health, Inc. | 211 | +15 | 0.3% |
| Community Health Plan of Washington | 210 | −38 | 0.3% |
| Health Care Service Corporation | 140 | −378 | 0.2% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 62 | +6 | under 0.1% |
| California Physicians' Service | 59 | +4 | under 0.1% |
| Providence Health & Services | 20 | −6 | 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, 3,479 beneficiaries in Clark County were assigned to 122 Medicare Shared Savings Program ACOs, 18.4% of assignable Original Medicare beneficiaries. Together, roughly 74% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.