The Cost of Private ADHD Assessments ADHD awareness is growing due to the high-profile personalities such as Sue Perkins and Nadia Sawalha however, long NHS waiting times are putting some people who need an assessment in a precarious situation. Some even have to pay for private treatment. In the UK http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1371978