Mental health triage is a clinical function conducted at point of entry to health services which aims to assess and categorize the urgency of mental health related problems. The mental health triage service may be located in the Emergency Department, Community Mental Health Services, Call Centre, or co-located with other specialist mental health services such as the Crisis Assessment and Treatment Team. Emergency Services such as police and ambulance may also have a co-located mental health triage service. There is considerable variation in the clinical settings in which mental health triage services may be operating, therefore service delivery models vary, however, the essential function is to determine the nature and severity of the mental health problem, determine which service response