How Many Symptoms Are Required for an ADHD Diagnosis in Adults per DSM-5?

According to the DSM-5 criteria, an ADHD adult diagnosis requires the presence of at least five symptoms from two categories: inattention and hyperactivity-impulsivity. Adults only need to meet five symptoms, as opposed to the six required for children, because their symptoms can present differently and are frequently more subtly expressed. These symptoms must significantly impair one’s ability to function at work, in social situations, or in one’s personal life and must be present for at least six months. 

Adult symptoms of ADHD typically include challenges with focus, organising tasks, following through on commitments, and maintaining attention during conversations or while reading. Hyperactivity-impulsivity symptoms might manifest as restlessness, difficulty remaining seated for long periods, or making impulsive decisions without considering the consequences. 

For an ADHD adult diagnosis, symptoms must not only meet the DSM-5 criteria but must also have been present before the age of 12. This ensures that the diagnosis takes into account the long-term nature of ADHD, even if the symptoms have become less overt with age. 

How It Helps 

The DSM-5 criteria for an ADHD adult diagnosis provide a clear framework for identifying the disorder in adults. By recognising adult symptoms, healthcare professionals can diagnose ADHD accurately, leading to more targeted treatments and support for managing the condition in adult life. This allows for better coping strategies and improvements in productivity and personal relationships. 

Visit providers like ADHD Certify for personal consultations and expert advice tailored to your needs.   

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to DSM-5 Diagnostic Guidelines.