Chronic mood disorders (e.g., bipolar disorders, depression) are common and are associated with extensive functional impairment, medical comorbidity, and personal and societal costs. While unipolar depression is more common, bipolar disorder is more costly on a per patient basis due to its chronic and severe nature. Moreover, bipolar disorder is the most expensive mental disorder for U.S. commercial health plans and employers. While evidence-based care parameters have been well established for mood disorders, quality of care and health outcomes in general mental health practice are suboptimal. The majority of these patients suffer from clusters of comorbid conditions, both physical and mental. Thus mood disorders represent optimal tracer conditions with which to improve management strategies for individuals with multiple chronic conditions.