Research suggests that about 80 percent of physical illnesses are missed during initial mental health assessments. Most often this occurs because the clinician has not spent time taking a thorough medical history. The danger here is that many people with emotional, mood, or thought disorders tend to seek out mental health services before they consider a medical assessment. It is not until they get worse or develop observable physical illness that they seek medical help. Unfortunately, by this time the disease has progressed to a serious level.