Is ADHD a mental illness? Mental illness is a very broad term. It refers to any type of condition that affects a person's behavior, mood or thinking. That can cover everything from mild anxiety to severe depression or bipolar disorder. It also includes ADHD (also known as ADD). For more information, please contact us today. VIEW PERVIOUS POST: https://mountain-vista-psychology-pllc.business.site/posts/1626622458098998408 VIEW DIRECTIONS FROM Castlewood, Colorado 80112: https://goo.gl/maps/721eEKdafX2T6bBt7 Mountain Vista Psychology, PLLC 88 Inverness Cir E Building E – Suite 103 Englewood, CO 80112 (720) 583-9332