How Much Does An ADHD Private Diagnosis Cost in the UK? The NHS is flooded with people who would like to be diagnosed with ADHD and waiting times are long. Some private health insurance companies will pay the cost for an assessment. It is difficult to determine the exact number https://telegra.ph/The-Private-ADHD-Diagnosis-Awards-The-Best-Worst-And-Weirdest-Things-Weve-Seen-06-07