It is important for the PMHNP to have a comprehensive understanding of mood disorders in order to assess and accurately formulate a diagnosis and treatment plan for patients presenting with these disorders. Mood disorders may be diagnosed when a patient’s emotional state meets the diagnostic criteria for severity, functional impact, and length of time. Those with a mood disorder may find that their emotions interfere with work, relationships, or other parts of their lives that impact daily functioning. Mood disorders may also lead to substance abuse or suicidal thoughts or behaviors, and although they are not likely to go away on their own, they can be managed with an effective treatment plan and understanding of how to manage symptom