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 However, the wait is long. Some people have reported waiting for three years. GPs can refer patients to private clinics or prescribe medications https://private-adhd-assessment80124.dbblog.net/3102002/an-all-inclusive-list-of-adhd-assessment-private-dos-and-don-ts