Throughout our thirty-five year history, the clinicians at MTC have pioneered many innovative programs for unique and diverse populations including dually diagnosed individuals, young adults, adults, adolescents, pregnant women and teens, women with young children, individuals who have trouble with prescription pain medications and adolescents with serious learning, social and behavioral issues. About Us : The MTC organization offers substance abuse, mental health and dual diagnosis education, prevention and treatment in discrete and highly specialized programs.