ADHD Diagnosis - Getting the Right One From the NHS The NHS requires that people undergo a thorough assessment for a proper ADHD diagnosis. The BBC investigation revealed that a few private clinics might provide inaccurate diagnoses and prescriptions. A legitimate diagnosis for ADHD is based on the number, severity, http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1556659