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, but it's a long wait. Some people have reported waiting for up to three years. GPs may refer patients to private clinics, or prescribe medication https://iam-psychiatry88488.jts-blog.com/29128355/7-essential-tips-for-making-the-most-out-of-your-adhd-assessment-private