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 evaluation However, the wait is long. Some people have reported waiting for up to three years. The GP may refer patients to private clinics https://garrettmcsdb.bleepblogs.com/29746745/learn-more-about-adhd-assessment-private-while-working-from-at-home