ADHD Assessment - Why It's Better to Get a Private One Instead of Waiting on the NHS The NHS can offer a private ADHD assessment but it's a lengthy wait. Some have reported waiting for up to three years. GPs may refer patients to private clinics, or prescribe medications under https://psychiatristinuk35960.dbblog.net/3030687/5-the-5-reasons-adhd-assessment-private-can-be-a-beneficial-thing