All residents of the state of Washington are covered.
The unemployed are covered.
The homeless are covered.
Those traveling temporarily out of the state are covered.
Those living here for a temporary job are covered.
Resident is defined by the HCA. See the Residency Flowchart
And to make sure it’s in writing:
No person shall, on the basis of race, color, national origin, age, disability, or sex, including sex stereotyping, gender identity, sexual orientation, and pregnancy and related medical conditions, be excluded from participation in, be denied the benefits of, or be subjected to discrimination by any participating provider or any entity conducting, administering, or funding a health program or activity, including contracts of insurance, under this chapter.