The Cost of Private ADHD Assessments ADHD awareness is on the rise because of high-profile celebrities such as Sue Perkins and Nadia Sawalha however, long NHS waiting times are leaving those who require the diagnosis in a vulnerable position. Some even have to pay for private treatment. In the UK http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1373132