Suffolk DBT J.L., LCSW is a private practice in Suffolk County, NY, which provides the full spectrum of Dialectical Behavior Therapy (DBT) treatment. Dialectical Behavior Therapy is a form of cognitive behavior therapy designed to help people work through problems including overwhelming emotions, impulsive behavior, self-injury, substance abuse, eating disorders, trauma, and conflictual relationships. Our highly trained clinicians are available to help you cope with these issues using highly effective evidence-based DBT techniques. Dialectical Behavior Therapy is widely considered one of the most effective treatments for Borderline Personality Disorder.