1B20

ICD-11 MMS 2026-01

Leprosy

Description

A disease caused by an infection with Mycobacterium leprae. This disease commonly presents with a long asymptomatic period followed by granulomatous lesions of the skin, respiratory tract, and peripheral nerves. Transmission is commonly by droplet transmission. Confirmation is by identification of Mycobacterium leprae with skin biopsy.

Inclusions

  • Infection due to Mycobacterium leprae

Exclusions from above levels

  • NE83.1 – Infection arising from device, implant or graft, not elsewhere classified

Child codes

  • 1B20.0 – Paucibacillary leprosy
  • 1B20.1 – Multibacillary leprosy
  • 1B20.2 – Leprosy reactions
  • 1B20.3 – Complications of leprosy
  • 1B20.Z – Leprosy, unspecified

Sibling codes

  • 1B21 – Infections due to non-tuberculous mycobacteria
  • 1B2Y – Other specified mycobacterial diseases
  • 1B2Z – Mycobacterial diseases, unspecified

Foundation entity

Leprosy – http://id.who.int/icd/entity/149072669

Allowed postcoordination axes

Part of: 01: Certain infectious or parasitic diseases