The Cost of Private ADHD Assessments The general public is becoming aware of ADHD thanks to celebrities like Sue Perkins and Nadia Sawalha. However, long NHS waiting periods leave some people in a dangerous situation. Some people are being forced to pay for treatments that are private. In the UK http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1557415