Washington Revised Code Title 48. Insurance § 48.43.176. Eosinophilic gastrointestinal associated disorder--Elemental formula

(1) Each health benefit plan issued or renewed after December 31, 2015, must offer benefits or coverage for medically necessary elemental formula, regardless of delivery method, when a licensed physician or other health care provider with prescriptive authority:

(2) Nothing in this section prohibits a health benefit plan from requiring prior authorization or imposing other appropriate utilization controls in approving coverage for medically necessary elemental formula.