ADHD Diagnosis A diagnosis of ADHD can help people discover the reason they are unable to perform certain tasks and activities. It can also boost confidence in themselves and help them develop effective treatment plans. The NHS in England offers an adult ADHD assessment. This is called Right to Choose. https://nieceocelot8.bravejournal.net/expert-advice-on-private-adhd-assessment-from-an-older-five-year-old