ADHD Diagnosis - Getting the Right One From the NHS The NHS requires that people undergo a thorough evaluation for an accurate ADHD diagnosis. The BBC investigation revealed that a few private clinics might be handing out inaccurate diagnoses and prescriptions. A valid ADHD diagnosis is based on symptoms, their http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1372062