ADHD Assessment - Why it's Important to Get a Private ADHD Diagnosis Anyone who believes they may have ADHD but has not been diagnosed should get an ADHD assessment. The process could take between 2 and 3 sessions. It is recommended to bring along a friend or a family member. https://cristiancntyd.blogtov.com/10244124/adhd-diagnosis-uk-private-explained-in-fewer-than-140-characters