How Much Is A Private ADHD Assessment? If you want to decrease your waiting times for an ADHD assessment you can do that by opting to pay privately. This is known as your Right to Choose, and it is an option that is available to any registered GP in England. https://obedient-freesia-hjhc08.mystrikingly.com/blog/enough-already-15-things-about-private-adhd-we-re-overheard