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 however, it's a long wait. Some people have reported waiting for up to three years. GPs can refer patients to private clinics or prescribe medications https://johnathanwzyuq.theideasblog.com/30268579/5-must-know-adhd-assessment-private-practices-you-need-to-know-for-2023