[Excerpt] This report begins with a working definition of the mental health workforce and a brief discussion of alternative definitions. It then describes three dimensions of the mental health workforce that may influence quality of care, access to care, and costs of care: (1) licensure requirements and scope of practice for each provider type in the mental health workforce, (2) estimated numbers of each provider type in the mental health workforce, and (3) average annual wages for each provider type in the mental health workforce. The report then briefly discusses how these dimensions of the mental health workforce might inform certain policy discussions.