Complex medical comorbidity is an increasingly important concern in inpatient psychiatric care. This should not be surprising, because patients with psychiatric disorders have higher medical comorbidity and mortality rates than the general population. The presence of comorbid conditions, either psychiatric or medical, complicates patient care, in that general medical problems can lead to or exacerbate psychiatric symptoms and vice versa. Individuals with chronic mental illness are at particularly high mortality risk, with their lives shortened by up to 25 years, according to some estimates.