ADHD Assessment - Why it's Important to Get a Private ADHD Diagnosis Anyone who suspects that they be suffering from ADHD but hasn't been diagnosed should seek an ADHD assessment. The process can take between 2 and 3 sessions. It is recommended to bring along a friend or family member. https://brooksoyejo.ttblogs.com/9289873/a-trip-back-in-time-how-people-discussed-adhd-diagnosis-uk-private-20-years-ago