WA HB2453

Adds "board-certified psychiatric pharmacist" to the definition section of Washington's involuntary treatment act (RCW 71.05), defining it as a pharmacist licensed under chapter 18.64 RCW who holds a psychiatric pharmacy specialty certification

Authorizes board-certified psychiatric pharmacists to provide declarations supporting petitions for assisted outpatient treatment, alongside physicians, physician assistants, and advanced registered nurse practitioners

Allows board-certified psychiatric pharmacists to sign petitions for 14-day involuntary detention or 90-day less restrictive alternative treatment orders

Permits board-certified psychiatric pharmacists to provide concurring medical opinions approving involuntary antipsychotic medication administration under less restrictive alternative treatment orders

Contains phased effective dates: sections 3, 5, and 7 expire June 30, 2027, with sections 4, 6, and 8 taking effect that same date; section 2 takes effect contingent on section 26, chapter 433, Laws of 2023