How Much Does A Private ADHD Diagnosis Cost? If you are an adult with ADHD, you may need to pursue a private path to get diagnosed. This is a good alternative, since many private psychiatrists have experience in diagnosing ADHD in adults. They also look for co-morbidities, such as depression https://telegra.ph/Why-No-One-Cares-About-Private-Adult-ADHD-Assessment-03-07