The Cost of Private ADHD Assessments The general public is becoming aware of ADHD because of the celebrity appearances of Sue Perkins and Nadia Sawalha. However, the long NHS waiting times put some people in a vulnerable situation. Some have to pay for private treatment. In the UK it is http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1912299