ADHD Diagnosis - Getting the Right One From the NHS To give people an accurate diagnosis of ADHD the NHS requires a thorough assessment. The BBC investigation revealed that a few private clinics might be handing out inaccurate diagnoses and prescriptions. A valid ADHD diagnosis is based on the symptoms http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1372346