ADHD Diagnosis - Getting the Right One From the NHS The NHS requires that patients undergo a thorough evaluation for an accurate ADHD diagnosis. The BBC investigation revealed that a few private clinics may be giving out unreliable diagnosis and inappropriate medication. A valid ADHD diagnosis is based on symptoms, https://slavepalm9.bravejournal.net/the-worst-advice-weve-been-given-about-adhd-private-assessment