Medicaid plans › Washington
Washington Medicaid Managed-Care Plans for Providers
Enrollments are billed 50% at the start and 50% at submission; everything else 100% at the start.
Apple Health is run by the Washington State Health Care Authority. 1,660,905 people were enrolled in its 5 managed-care plans in 2024. To see their patients, a provider enrolls with Apple Health through ProviderOne, then applies to each plan separately.
| Plan | Members (2024) | Share | Parent |
|---|---|---|---|
| Molina Healthcare of Washington | 837,457 | 50.4% | Molina Healthcare |
| Community Health Plan | 252,143 | 15.2% | In-state |
| UnitedHealthcare | 208,078 | 12.5% | UnitedHealth Group |
| Coordinated Care of Washington | 196,657 | 11.8% | Centene |
| Wellpoint Washington | 166,570 | 10% | Elevance Health |
How Joining Works in Washington
First the state: Apple Health enrollment through ProviderOne, which gives you the Medicaid ID every plan asks for. Then the plans: each takes its own participation request and credentials you from your CAQH ProView (DataSpring) profile. 4 parent companies run plans here, and plans owned by the same company still contract state by state.
How to Join Each Washington Plan
Molina Healthcare of Washington (Molina Healthcare): Molina credentials each state separately. The contract request goes through the state's Molina provider site and requires an active state Medicaid enrollment; credentialing uses your CAQH ProView (DataSpring) profile.
UnitedHealthcare (UnitedHealth Group): UnitedHealthcare Community Plans use UnitedHealthcare's provider onboarding: a participation request on the UnitedHealthcare provider site, credentialing from your CAQH ProView (DataSpring) profile, then a state-specific Community Plan agreement.
Coordinated Care of Washington (Centene): Centene runs this plan alongside its Ambetter and Wellcare products. Each Centene plan takes its own contract request on the plan's provider website, credentials from your CAQH ProView (DataSpring) profile, and will not load a provider without the state Medicaid ID.
Wellpoint Washington (Elevance Health): Elevance Health plans take participation requests through the plan's provider site for that state, most of them now inside Availity Essentials, and credential from your CAQH ProView (DataSpring) profile. Each state is its own contract.
Community Health Plan: This plan is run in-state rather than by a national carrier, so participation requests go to the plan's own provider relations or contracting team, listed on its provider website.
Also in Washington: Medicare, Apple Health and commercial credentialing.
Questions
Which Washington Medicaid plan is the largest?
Molina Healthcare of Washington, with 837,457 members in 2024, 50.4% of the 1,660,905 people enrolled in Washington's Medicaid managed-care plans.
Do I have to join every Washington Medicaid plan?
No. Each plan is a separate contract. Practices usually start with the two or three largest plans in their county, then add others as patients ask for them. All of them require Apple Health enrollment first.
Membership from KFF, Medicaid MCO Enrollment by Plan and Parent Firm, 2024. Plans change when the state rebids its contracts; we confirm the current list on every file.