Medicare Advantage in Whatcom County, Washington
25,356 people in Whatcom County, Washington were enrolled in Medicare Advantage in October 2026, 46.5% of 54,532 eligible beneficiaries (−0.7 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 37% of reported enrollment; 12 parent organizations have 11 or more members and the HHI is 2,530 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 17,532 members here are in plans that terminate or leave the county, and Kaiser Foundation Health Plan, Inc. leaves. MA plans offered go from 20 to 9.
Parent organizations in Whatcom County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 9,456 | −75 | 37.4% |
| Kaiser Foundation Health Plan, Inc. | 6,543 | −1 | 25.9% |
| Centene Corporation | 4,691 | +831 | 18.6% |
| Humana Inc. | 2,427 | −496 | 9.6% |
| Molina Healthcare, Inc. | 926 | +46 | 3.7% |
| CVS Health Corporation | 684 | +8 | 2.7% |
| Community Health Plan of Washington | 357 | −123 | 1.4% |
| Elevance Health, Inc. | 91 | −4 | 0.4% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 35 | 0 | 0.1% |
| Health Care Service Corporation | 33 | +3 | 0.1% |
| California Physicians' Service | 17 | +1 | under 0.1% |
| Cambia Health Solutions, Inc. | 12 | −14 | 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, 1,773 beneficiaries in Whatcom County were assigned to 104 Medicare Shared Savings Program ACOs, 9.2% of assignable Original Medicare beneficiaries. Together, roughly 51% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.