The Cost of Private ADHD Assessments The public is becoming more aware of ADHD because of the celebrity appearances of Sue Perkins and Nadia Sawalha. However, the long NHS waiting periods leave some people in a dangerous situation. Some patients are required to pay for private treatments. In the UK http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1372771