ADHD Assessment - Is it Right For You? A private assessment can last between 2 and 3 hours and includes a medical interview with an expert in ADHD. It is helpful to bring an adult friend or family member for support, but this is not essential. A full psychiatric history https://privateadhdassessment58888.blogkoo.com/10-misconceptions-your-boss-has-concerning-adhd-assessment-uk-private-49511274