Dysthymic disorder

This code represents a chronic, persistent form of depression characterized by a low-grade, long-term depressed mood that lasts for at least two years in adults (one year in children and adolescents). Individuals experience a range of symptoms, including low energy, poor appetite or overeating, insomnia or hypersomnia, low self-esteem, poor concentration, and feelings of hopelessness, but these symptoms are typically less severe than those seen in major depressive disorder.

Assign this code when documentation clearly indicates a diagnosis of persistent depressive disorder (dysthymia). This diagnosis is supported by a history of chronic depressive symptoms that do not meet the full criteria for a major depressive episode, but significantly impact daily functioning. Look for diagnostic statements from a psychiatrist or other qualified mental health professional.

• Differentiate from major depressive disorder; dysthymia is characterized by chronicity and less severe, but persistent, symptoms.
• Review documentation carefully to ensure the duration criteria (at least two years for adults) are met.
• Be mindful of the Excludes2 note for anxiety depression, which indicates these conditions are classified elsewhere and should not be coded together unless specifically documented as co-occurring and distinct.