Acadia Healthcare | 52,751 followers on LinkedIn. Headquartered in Franklin, Tennessee, Acadia Healthcare was established in January 2005 to develop and operate a network of behavioral health facilities across the country. Acadia Healthcare’s mission is to create a world-class organization that sets the standard of excellence in the treatment of specialty behavioral health and addiction disorders. Acadia’s management style and philosophy is one of collaboration and flexibility as we create an energetic and team-oriented service delivery system.