ADHD Assessment - Why It's Better to Get a Private One Instead of Waiting on the NHS The NHS can provide a private ADHD assessment however, it's a long wait. Some people have reported waiting for up to three years. GPs can refer patients to private clinics or prescribe medication https://simonuqzgs.bloguetechno.com/five-adhd-assessment-private-projects-for-any-budget-65078431