How Much Is a Private ADHD Assessment? If you want to cut down on the time it takes to get an ADHD assessment you can do that by opting to pay privately. This is referred to as Your Right to Choose and is available to all registered GPs in England. https://psychiatry-uk85897.onesmablog.com/ten-adhd-assessment-uk-private-myths-that-aren-t-always-true-70175915