How Much Is A Private ADHD Assessment? If you want to be able to reduce your waiting times for an ADHD assessment, you can do so by choosing to pay privately. This is called your Right to Choose, and it is an option available to any registered GP in England. https://telegra.ph/Responsible-For-A-Private-ADHD-Budget-10-Unfortunate-Ways-To-Spend-Your-Money-03-06