The Cost of Private ADHD Assessments ADHD awareness is on the rise due to the high-profile personalities such as Sue Perkins and Nadia Sawalha, but long NHS waiting times are putting those who require an assessment in a precarious position. Some have to pay for private treatment. In the UK http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1373116