WA SB5921

Creates the Washington Medical Use of Psilocybin Program under the Department of Health, allowing licensed clinicians to administer psilocybin to qualified patients aged 18 and older for treatment-resistant conditions

Exempts program participants (producers, clinicians, and qualified patients) from arrest, prosecution, or penalties for psilocybin-related activities conducted in compliance with the program

Establishes two license types: producer licenses for manufacturing psilocybin products from mushrooms, and clinician participation licenses for dispensing and administering psilocybin to patients

Requires clinicians to maintain detailed records, use a secure electronic registry to track treatments, and store psilocybin products in locked facilities with limited access

Takes effect July 1, 2028, and amends RCW 69.50.101 to exclude psilocybin used for medical purposes under this act from the definition of "controlled substance"