How Much Is a Private ADHD Assessment? If you'd like to decrease the time it takes to get an ADHD assessment you can do that by choosing to pay privately. This is known as your Right to Choose and it is an option available to any registered GP in England. https://dantewnpdc.blogsuperapp.com/29885049/this-is-what-adhd-assessment-uk-private-will-look-like-in-10-years-time