ADHD Assessment - Why It's Better to Get a Private One Instead of Waiting on the NHS The NHS offers an individual ADHD assessment However, the wait is long. Some patients reported waiting for three years. GPs can refer patients to private clinics or prescribe medication in a shared-care arrangement https://ukpsychiatry81352.liberty-blog.com/29814047/why-adhd-assessment-private-is-everywhere-this-year