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://messiahlqpmj.suomiblog.com/what-is-adhd-assessment-private-and-why-is-everyone-dissing-it-45540059