ADHD Private Assessment - Getting an Accurate Diagnosis A nurse or psychiatrist must perform a private assessment to diagnose ADHD. Only healthcare professionals with this expertise can diagnose ADHD in the UK. They will look for ADHD symptoms and mental health issues from childhood, including school reports and interview you. https://psychiatry45205.bloggazza.com/29094541/the-history-of-adhd-assessment-private-in-10-milestones