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 lengthy wait. Some have reported waiting for 3 years. GPs may refer patients to private clinics or prescribe medication under a shared https://donovanfwsss.blogoscience.com/35802440/15-interesting-facts-about-adhd-assessment-private-that-you-didn-t-know