ADHD Assessment - Why It's Better to Get a Private One Instead of Waiting on the NHS The NHS offers a private ADHD assessment however, it's a long wait. Some patients reported waiting for three years. GPs can refer patients to private clinics or prescribe medication under a shared-care agreement https://psychiatristuk03799.ziblogs.com/29326151/what-adhd-assessment-private-experts-want-you-to-know