How Apple Health Organizes Medicaid in Washington
Washington does not use the word Medicaid on most of its own forms and web pages. The state calls its program Apple Health, and the Washington State Health Care Authority (HCA) runs it. A search for a Medicaid office in Washington usually means one of three things: you want to apply, ask about an existing case, or get help reading a notice from HCA or the Department of Social and Health Services (DSHS).
Washington expanded Medicaid eligibility in 2014 under the Affordable Care Act. Adults aged 19 to 64 generally qualify when household income is at or below 138 percent of the federal poverty level. Children, pregnant people, and some other groups can qualify at higher income levels. Washington also covers eligible children regardless of immigration status. Rules differ for people who are 65 or older, blind, or living with a disability, so the answer to whether you qualify depends on your household.
Two agencies share the work. HCA administers Apple Health and handles most family, child, pregnancy, and adult-expansion coverage. DSHS determines eligibility for long-term services and supports, such as in-home personal care and nursing facility care, along with programs for older adults and people with disabilities. If your situation involves long-term care, expect to deal with both agencies at some point.
Managed Care Plans and Your ProviderOne Number
Most Apple Health clients receive their care through a managed care plan. Washington contracts with several plans, including Molina Healthcare, Coordinated Care, Community Health Plan of Washington, UnitedHealthcare Community Plan, and Wellpoint. Which plans you can pick depends on the county where you live. You choose a plan through your ProviderOne account or Washington Healthplanfinder. If you do not choose, HCA assigns one. Some groups, including American Indian and Alaska Native members, can use Apple Health without enrolling in a plan.
Once approved, you receive a ProviderOne client number. It is nine digits followed by the letters WA. Clinics and pharmacies use it to confirm your coverage, so keep it handy.
Applying for Apple Health in Washington: Online, by Phone, or in Person
Most Washington residents never need to walk into an office. Washington Healthplanfinder, run by the Washington Health Benefit Exchange, is the main online door for Apple Health applications. Unlike private marketplace plans, Apple Health enrollment is open all year. You can apply when you lose a job, become pregnant, or see your income drop. There is no waiting for a November enrollment window.
You can also apply by phone through HCA, or on paper by mail. Hospitals, community health centers, and tribal and nonprofit organizations across the state employ application assisters and Navigators who help at no charge. They are often the fastest route if you struggle with the online form or need help in another language.
After you apply, the agency may ask for proof of income, identity, or residency. Respond by the date printed on the letter. Missing a deadline is one of the most common reasons applications stall, and a quick phone call can often fix it.
Medicaid Office Listings in Seattle and Friday Harbor
Our database lists two Medicaid offices in Washington. They sit at opposite ends of the state's range, one in its largest city and one on an island reached by ferry.
Seattle Washington Medicaid Office, King County
The Seattle Washington Medicaid Office is at 1120 Cherry Street, Seattle, and can be reached at 206-215-2333. It serves the area around downtown in King County, the most populous county in the state. Downtown Seattle is well served by buses, light rail, and the Link and Sounder lines, so reaching the office without a car is realistic. Parking downtown is limited and costly, so transit is usually the easier choice.
Friday Harbor Washington Medicaid Office, San Juan County
The Friday Harbor Washington Medicaid Office is at 55 2nd Street North, Friday Harbor, with the phone number 360-378-3570. Friday Harbor is the town and county seat on San Juan Island, within San Juan County. There is no bridge to the mainland, so a visit means planning around Washington State Ferries sailings or other island transport.
Hours, appointment rules, and the services handled in person can change. Call before you go, and ask whether the visit can be done by phone or online instead.
Metro Seattle Versus the San Juan Islands and Rural Washington
Geography shapes the Medicaid experience in Washington more than most people expect. In King County, you have large hospital systems, many community clinics, and a dense network of nonprofit helpers. Public Health, Seattle and King County also supports residents in finding care. The county is one of the most linguistically diverse in the state, and interpreter help is easy to request.
In San Juan County, the picture is different. The islands have a small year-round population and a limited number of local providers. Many residents travel off-island for specialty care, often to Anacortes, Mount Vernon, or Bellingham. Ferry schedules, weather, and cost all affect how often someone can make that trip. Apple Health's non-emergency medical transportation benefit can help with rides to covered appointments, but you generally need to arrange it in advance. For benefits questions, phone and online options are usually less costly in time than a ferry crossing.
Rural counties in eastern and central Washington share some of these challenges, including long drives and few in-person offices. If you live far from any office, treat the phone line and online portals as your main tools, and use a local health center for hands-on help.
What to Bring and When to Go
Plan a visit like a short appointment. Gather the following before you leave home:
- Photo identification for each adult applying.
- Proof of income, such as recent pay stubs, a benefits letter, or last year's tax return.
- Proof of Washington residency, such as a lease or utility bill.
- Your ProviderOne client number and any letters you received from HCA or DSHS.
- Immigration documents, if they apply to the person seeking coverage.
Mid-week mornings are usually calmer than Mondays or the days after a holiday, though no schedule is guaranteed. If you are renewing coverage, watch your mail and your online account for notices. Keep your address and phone number current, because missed letters cause avoidable coverage gaps. If your income, household size, or address changes, report it promptly.
Medicaid in Washington is administered by the state health and human services agency, providing health coverage for eligible low-income residents through a combination of fee-for-service and managed care delivery systems tailored to the state's population needs.
Medicaid Office locations are available in 2 cities across Washington. They are spread across 2 counties.
Cities with the highest concentration include Seattle, Friday Harbor, which have the largest Medicaid caseloads in the state and dedicated eligibility offices to serve high-need urban populations.
Residents of Washington can apply for Medicaid online through the state's health benefits portal or health exchange, by calling the Medicaid agency's toll-free number, or by visiting a local eligibility office with the required documentation.
Friday Harbor Washington Medicaid Office
Seattle Washington Medicaid Office
Residents of Washington who currently receive Medicaid should complete their annual renewal on time to avoid a gap in coverage. Most states send renewal notices by mail and email, and online renewal is typically the fastest method to maintain uninterrupted healthcare coverage.
Browse Medicaid Office by county across Washington to find the nearest location.
Reaching a Washington Medicaid Office from Seattle to the San Juan Islands
Both listings in our database sit in very different parts of the state, and that shapes how you plan a visit. The Seattle office at 1120 Cherry Street is in King County, where public transit, many clinics, and multilingual services are close at hand. The Friday Harbor office at 55 2nd Street North is in San Juan County, where a ferry crossing is part of almost every trip to the mainland. Before you go, phone the office to confirm hours and ask which services are handled in person.
Washington residents who live outside these two counties are not left out. Applications, renewals, plan changes, and address updates can be handled through Washington Healthplanfinder, the ProviderOne portal, or the HCA customer service line. Community health centers and hospital financial counselors in nearly every county also help people apply at no charge. If you do visit in person, bring photo identification, proof of income, and your ProviderOne client number if you already have one. Keep copies of everything you submit, and write down the date and the name of anyone who helps you. That simple record makes it much easier to resolve problems later.