How Much Does A Private ADHD Diagnosis Cost? You might have to take the private option if you are an adult suffering from ADHD. This is a viable option since private psychiatrists are more experienced in diagnosing adults with ADHD. They will also screen for co-morbidities such as depression and http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1372039