How Much Is A Private ADHD Assessment? If you'd like to cut down on your waiting times for an ADHD assessment, you can do so by choosing to pay privately. This is known as your Right to Choose, and it is an option available to anyone registered with a GP https://telegra.ph/Ask-Me-Anything-10-Answers-To-Your-Questions-About-ADHD-Diagnosis-Adults-Private-UK-06-04