ADHD Assessment - Why It's Better to Get a Private One Instead of Waiting on the NHS The NHS can offer an individual ADHD assessment but it's a lengthy wait. Some people reported waiting three years. Doctors can refer patients to private clinics, or prescribe medication under a shared-care agreement https://ukpsychiatry81352.liberty-blog.com/29814047/why-adhd-assessment-private-is-everywhere-this-year