ADHD Assessment - Why it's Important to Get a Private ADHD Diagnosis Anyone who believes they may be suffering from ADHD but hasn't been diagnosed should seek an ADHD assessment. The process may take between 2 and 3 sessions. It is suggested to bring along a friend or family member. https://privateadhdassessment35556.blogoscience.com/35834410/the-best-tips-you-ll-ever-receive-on-adhd-diagnosis-uk-private