WA HB1124

Creates a new "prescribing psychologist" certification allowing licensed psychologists to prescribe, administer, and discontinue psychotropic medications for psychiatric and behavioral disorders after completing additional training requirements

Requires applicants to complete a master's degree in clinical psychopharmacology (minimum 400 contact hours over 2 years), 80 hours of supervised physical assessment training, and a clinical prescribing fellowship with at least 500 hours treating 100+ patients

Prohibits prescribing psychologists from prescribing opioid medications except for treatment of opioid use disorders, and requires them to maintain collaborative relationships with patients' primary care providers

Expands the examining board of psychology from nine psychologists and two public members to include one additional expert on psychiatric prescribing (such as a physician, psychiatric nurse practitioner, or pharmacist with psychopharmacology expertise)

Allows certification by endorsement for psychologists with prescriptive authority from other states or training through U.S. Department of Defense programs with substantially equivalent requirements