Borderline leprosy [group B]

This code describes borderline leprosy, also known as dimorphous leprosy, which is an unstable form of Hansen's disease characterized by features of both tuberculoid and lepromatous leprosy. It represents an intermediate clinical and immunological state, often presenting with a wide spectrum of skin lesions and nerve involvement.

Use this code when documentation specifies a diagnosis of borderline leprosy, dimorphous leprosy, or group B leprosy. This diagnosis is typically made based on clinical presentation, histopathological findings from skin biopsies, and bacteriological indices.

• Differentiate from other forms of leprosy (e.g., tuberculoid, lepromatous) based on specific clinical and histopathological findings.
• Ensure documentation clearly supports the "borderline" classification rather than a more stable form of the disease.
• Consider any associated complications, such as nerve damage or reactions, and code them separately if documented.