AA01

ICD-11 MMS 2026-01

Cellulitis of external ear

Description

A diffuse subacute bacterial infection of the soft tissues of the external ear, most commonly due to beta-haemolytic streptococci. It may arise within an apparently healthy external ear but may complicate both inflammatory and infective forms of otitis externa.

Index terms

  • Cellulitis of external ear
  • Cellulitis of external auditory canal
  • Cellulitis of pinna
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  • Cellulitis of auricle

Excludes

  • 1B70.01 – Erysipelas of external ear
  • 1B70.1 – Streptococcal cellulitis of skin
  • 1B70.2 – Staphylococcal cellulitis of skin

Exclusions from above levels

  • 01 – Certain infectious or parasitic diseases
  • 02 – Neoplasms
  • 05 – Endocrine, nutritional or metabolic diseases
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  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 19 – Certain conditions originating in the perinatal period
  • 22 – Injury, poisoning or certain other consequences of external causes

Sibling codes

  • AA00 – Abscess of external ear
  • AA02 – Malignant otitis externa
  • AA03 – Otomycosis
  • AA04 – Perichondritis of external ear
  • AA0Y – Other specified infectious diseases of external ear
  • AA0Z – Infectious diseases of external ear, unspecified

Foundation entity

Cellulitis of external ear – http://id.who.int/icd/entity/1308808115

Allowed postcoordination axes

Part of: 10: Diseases of the ear or mastoid process