ADHD Diagnosis - Getting the Right One From the NHS The NHS requires that people undergo a thorough evaluation for the correct ADHD diagnosis. The BBC investigation found that some private clinics may be giving inaccurate diagnoses and prescribing inappropriate medications. A valid diagnosis for ADHD is based on the http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1372165