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 can be long. Some patients reported waiting for three years. GPs may refer patients to private clinics or prescribe medications https://jeffreymepcj.blogtov.com/10313401/15-documentaries-that-are-best-about-adhd-assessment-private