Yes, there are three types of ADHD: Predominantly inattentive, Predominantly hyperactive-impulsive, and Combined hyperactive-impulsive and inattentive. Patients with Predominantly inattentive ADHD have difficulty paying attention and completing tasks. Patients with Predominantly hyperactive-impulsive ADHD show symptoms such as fidgeting and having difficulty waiting their turn. The most common form of ADHD is Combined hyperactive-impulsive and inattentive ADHD.