How Much Is a Private ADHD Assessment? If you want to be able to reduce the time it takes to get an ADHD assessment you can do that by opting to pay privately. This is known as Your Right to Choose and is available to all registered GPs in England. https://gunneremsbt.onesmablog.com/5-qualities-people-are-looking-for-in-every-adhd-assessment-uk-private-70238445