ADHD Diagnosis - Getting the Right One From the NHS In order for people to receive a proper diagnosis for ADHD the NHS requires a thorough assessment. The BBC investigation revealed that a few private clinics could provide unreliable diagnoses and inappropriate medication. A valid ADHD diagnosis is based on https://telegra.ph/20-Things-You-Need-To-Be-Educated-About-Private-Assessments-For-ADHD-06-06