WA HB1589

Health carriers must offer providers meaningful opportunity for good faith contract negotiations, including providing a designated contact person, marked-up contract copies showing all changes, and fee schedules at least 60 days before execution

Prohibits "all-or-nothing clauses" that require providers to contract with multiple health plans, and bans requirements that providers accept discounted rates for other insurance products

Carriers cannot penalize providers who appeal adverse benefit determinations, including charging fees for appeals or external reviews

Violations subject to fines up to $5,000 per violation; exemptions apply to providers employed by the health carrier, hospitals, health systems, or multistate clinic operators

Insurance commissioner must report annually to the legislature on trends in allowed amounts using all-payer claims database, beginning January 1, 2027; main provisions take effect January 1, 2027