How Much Is a Private ADHD Assessment? If you want to decrease the time it takes to get an ADHD assessment, you can do so by opting to pay privately. This is known as your Right to Choice and it is an option available to any registered GP in England. https://ukpsychiatrist68922.blogocial.com/where-can-you-find-the-most-reliable-adhd-assessment-uk-private-information-65702460