ADHD Assessment - Why it's Important to Find a Private Clinic If they suspect that the patient might have ADHD they can refer them to private ADHD testing services. However, this process can be long and frustrating. It is important to choose a psychiatrist who has experience treating ADHD. NHS https://mariogpvzd.blogoscience.com/35461835/10-meetups-about-adhd-diagnosis-private-uk-you-should-attend