Borderline personality disorder

This diagnosis code signifies a pervasive pattern of instability in interpersonal relationships, self-image, and affects, marked by impulsivity. Individuals often experience intense, fluctuating moods, chronic feelings of emptiness, and a fear of abandonment. These symptoms typically begin in early adulthood and are present in a variety of contexts.

Apply this code when documentation clearly indicates a diagnosis of borderline personality disorder, characterized by at least five of the nine diagnostic criteria outlined in the DSM-5. Supporting documentation should include a psychiatric evaluation, psychological assessment, or progress notes detailing the patient's symptoms and functional impairment consistent with the disorder.

• Differentiate carefully from other personality disorders, especially antisocial personality disorder, as indicated by the Excludes2 note.
• Ensure the provider's documentation explicitly states "borderline personality disorder" or provides sufficient detail to support this specific diagnosis.
• Consider co-occurring mental health conditions, such as mood disorders or substance use disorders, and code them appropriately in addition to this diagnosis.