ADHD Diagnosis - Getting the Right One From the NHS The NHS requires that people undergo a thorough evaluation in order to get an accurate ADHD diagnosis. The BBC investigation highlighted that some private clinics may be handing out inaccurate diagnoses and prescriptions. A valid diagnosis for ADHD is determined https://telegra.ph/The-Most-Hilarious-Complaints-Weve-Seen-About-Private-ADHD-Assessment-06-09