The Cost of Private ADHD Assessments ADHD awareness is growing due to the high-profile personalities like Sue Perkins and Nadia Sawalha however, long NHS waiting times have left some people who need an assessment in a precarious situation. Some people are forced to pay for private treatments. In the UK http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1372086