ADHD Diagnosis - Getting the Right One From the NHS The NHS requires that patients undergo a thorough evaluation in order to receive an accurate ADHD diagnosis. The BBC investigation revealed that some private clinics might be handing inaccurate diagnoses and prescribing inappropriate medications. A valid diagnosis for ADHD is http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1556645