ADHD Private Assessment - Getting an Accurate Diagnosis A nurse specialist or psychiatrist needs to perform a private assessment to diagnose ADHD. Only healthcare professionals from the UK are able to diagnose ADHD. They will search for ADHD symptoms and mental health issues from childhood as well as school reports. https://psychiatristsuk77082.ja-blog.com/29868000/what-s-the-good-and-bad-about-adhd-assessment-private