ADHD Diagnosis - Getting the Right One From the NHS The NHS requires that people undergo a thorough examination for a proper ADHD diagnosis. The BBC investigation highlighted that some private clinics could be handing out unreliable diagnoses and inappropriate medication. A valid ADHD diagnosis is based on the symptoms, https://telegra.ph/How-To-Get-More-Results-Out-Of-Your-UK-Private-ADHD-Diagnosis-04-08