ADHD Diagnosis - Getting the Right One From the NHS For people to get a proper diagnosis for ADHD the NHS requires a thorough assessment. The BBC investigation revealed that some private clinics could be giving inaccurate diagnoses and prescribing inappropriate treatment. A valid ADHD diagnosis is based on symptoms, https://telegra.ph/How-Private-Assessment-For-ADHD-Became-The-Top-Trend-On-Social-Media-03-06