ADHD Diagnosis - Getting the Right One From the NHS For people to get an accurate diagnosis of ADHD the NHS requires a thorough evaluation. The BBC investigation revealed that some private clinics may be giving inaccurate diagnoses and prescribing inappropriate medication. A valid ADHD diagnosis is based on symptoms, https://telegra.ph/Five-People-You-Must-Know-In-The-Private-ADHD-Assessment-Industry-06-09