ADHD Diagnosis - Getting the Right One From the NHS The NHS requires that patients undergo a thorough examination for a proper ADHD diagnosis. The BBC investigation found that some private clinics might be handing inaccurate diagnoses and prescribing inappropriate treatment. A valid ADHD diagnosis is based on the symptoms, http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1373317