ADHD Assessment - Why it's Important to Get a Private ADHD Diagnosis Anyone who believes they may have ADHD but hasn't been diagnosed should seek an ADHD assessment. The process could take up to two hours, and it is recommended to bring an adult family member or a friend along. https://psychiatristsuk41370.bloggactif.com/30632759/adhd-diagnosis-uk-private-what-no-one-is-talking-about