How Much Is a Private ADHD Assessment? If you want to cut down on your waiting times for an ADHD assessment, you can do so by paying privately. This is known as your Right to Choice and it is a choice available to anyone registered with a GP in England. https://psychiatristuk57746.blogrelation.com/35456651/10-easy-steps-to-start-your-own-adhd-assessment-uk-private-business