Overview. Join the transformative Southcoast Behavioral Health team and be part of a difference-making journey every day. Southcoast Behavioral Health, located in Dartmouth, Massachusetts, is a premier mental health treatment center with 192 beds. We serve pediatric, adolescent, adult, and geriatric patients, as well as adults with co-occurring mental health and substance use disorders. PURPOSE STATEMENT. Plan, direct and implement activity thera...