ICD-10 Code A30.4 – Borderline lepromatous leprosy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A30.4 – Borderline lepromatous leprosy
What it is
A30.4 identifies borderline lepromatous leprosy, a form of Hansen disease with features between borderline and lepromatous disease. It reflects infection with Mycobacterium leprae affecting skin and peripheral nerves.
Clinical signs
Typical findings include multiple skin lesions, sensory loss, and peripheral nerve involvement. Clinical features vary; refer to documentation for the exact classification and extent of disease.
When to use this code
Use A30.4 when the provider documents borderline lepromatous leprosy, lepromatous-borderline disease, or an equivalent term. Code it from the confirmed diagnosis, not from exposure or screening alone. If the record only says leprosy without subtype, check documentation.
Do not use for
Do not use this code for other forms of leprosy, such as tuberculoid or lepromatous leprosy, unless the documentation specifically supports A30.4. Do not assign it for suspected disease or historical infection.
Coding tip
Match the exact leprosy subtype in the note, and query when the classification is unclear.