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 long wait. Some people have reported waiting for up to three years. Doctors can refer patients to private clinics or prescribe medication https://zionbibvm.livebloggs.com/36038093/it-is-the-history-of-adhd-assessment-private-in-10-milestones