ADHD Assessment - Why It's Better to Get a Private One Instead of Waiting on the NHS The NHS offers the option of a private ADHD assessment, but the wait is long. Some people have reported waiting for up to three years. The GP may refer patients to private clinics https://uk-psychiatry25241.dgbloggers.com/30249770/how-to-tell-if-you-re-are-ready-for-adhd-assessment-private