ADHD Assessment - Is it Right For You? A private assessment can take between 2 and 3 hours and includes a medical interview with a specialist in ADHD. It is helpful to bring an adult family member or friend for support, but this is not required. A full psychiatric history https://andersonyxsmf.get-blogging.com/30265337/a-productive-rant-concerning-adhd-assessment-uk-private