The Cost of Private ADHD Assessments ADHD awareness is increasing thanks to high-profile figures such as Sue Perkins and Nadia Sawalha However, the long NHS waiting times have left some people who need a 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=1372973