Wash. Rev. Code § 48.43.725
(1) A health carrier that excludes, under state or federal law, any benefit required or mandated by this title or rules adopted by the commissioner from any health plan or student health plan shall:
(a) Notify each enrollee in writing of the following:
(2) For the purpose of mitigating inequity in the health insurance market, unless waived by the commissioner pursuant to (c) of this subsection, the commissioner must assess a fee on any health carrier offering a health plan or student health plan if the health plan or student health plan excludes, under state or federal law, any essential health benefit or coverage that is otherwise required or mandated by this title or rules adopted by the commissioner.
[ 2020 c 283 s 1.]