How Much Does A Private ADHD Diagnosis Cost? You might need to take the private route if you are an adult with ADHD. This is a great option because many private psychiatrists have experience in diagnosing adults with ADHD. They will also check for co-morbidities, such as depression and anxiety https://telegra.ph/30-Inspirational-Quotes-On-Private-ADHD-Assessment-Manchester-04-08