This bill adds new sections to chapter 48.43 RCW, amends several existing insurance statutes, and repeals certain older provisions, with many parts taking effect January 1, 2026. It substantially revises Washington’s mental health and substance use disorder parity rules by requiring health carriers to provide coverage for medically necessary behavioral health care consistent with generally accepted standards of care and nonprofit professional association recommendations, to apply the same cost-sharing and deductible rules as medical/surgical benefits, and to treat prescription drugs for covered behavioral health conditions the same as other drugs. The bill also incorporates federal mental health parity and addiction equity requirements as published at 89 Fed. Reg. 77586 (September 23, 2024). The bill imposes procedural and utilization review changes: utilization review and clinical criteria must be evidence-based and consistent with age-appropriate patient placement criteria from nonprofit professional associations; carriers must authorize placement consistent with those criteria or authorize the next higher level if the assessed level is unavailable; carriers must provide full detail of assessments in adverse benefit determinations. Health carriers must provide nonquantitative treatment limitation (NQTL) parity analyses on request at no charge, with a $100 per day penalty for failure to provide requested analyses and civil monetary penalties up to $5,000 per violation (or $10,000 if willful), and specified penalty amounts to be inflation-adjusted beginning 2031. The bill sets strict prior authorization timelines and requires carriers to implement interoperable prior authorization APIs (service API by Jan 1, 2025; drug API by Jan 1, 2027), prohibits prior authorization for initial evaluation plus up to six visits for certain therapies in a new episode of care, expands independent external review/IRO procedures including expedited review timelines, and establishes minimum coverage and authorization periods for inpatient/residential behavioral health and withdrawal management services for plans issued or renewed on or after specified dates. The insurance commissioner is given rulemaking and reporting duties, including authority to adopt DSM/ICD reference dates by rule, set utilization review standards, and report on federal API rule development. The bill defines key terms (for example, medically necessary, clinical review criteria, core treatment, withdrawal management services) and phases in expanded definitions of covered mental health and substance use services by plan issue/renewal dates (notably Jan. 1, 2021 and Jan. 1, 2026). Important text is missing from the provided excerpts: the remainder of the sentence addressing when a carrier “does not provide meaningful benefits,” the full text of section 2 (which contains repeated definitions and requirements referenced elsewhere), the specific amendments to each listed RCW, and some implementation and enforcement details (including the precise identity of some “requestor” rights), so those aspects are uncertain from the material provided.

If enacted, insurers will likely have to change how they run prior authorization and utilization review and how they price coverage for mental health and substance use care so those benefits look and operate like medical and surgical benefits. Consumers should see fewer up-front authorization barriers for initial evaluations and short courses of therapy, guaranteed short coverage periods for inpatient or residential behavioral health admissions before reviews are completed, and stronger protections against retroactive denials and late provider refunds. Providers and behavioral health agencies should get faster initial payment windows and more predictable authorization periods (for plans renewed after specified dates, initial inpatient/residential authorizations must be at least 14 days if approved and reauthorizations at least seven days), and they can request parity analyses from carriers at no charge; carriers that fail to provide those analyses face daily and civil penalties. The parties most affected are health carriers and third-party benefit managers, which will face new operational duties, likely IT and administrative costs to build prior authorization APIs by the dates in the bill or justify delays, obligations to change provider contracts and utilization rules, and exposure to penalties and independent review decisions they must implement and pay for. Behavioral health agencies and contracting providers will face new timing and documentation responsibilities but also reduced short-term prior authorization and payment risk, while enrollees should have faster access and clearer appeal paths. Important details are missing from the provided text—most notably the definition of what counts as “meaningful benefits,” the full contents of section 2, and the specific amendments and enforcement mechanisms in some repealed or amended RCWs—so the scope and practical impact of some requirements remain uncertain.