CB21.Z

ICD-11 MMS 2026-01

Pneumothorax, unspecified

Exclusions from above levels

  • 1B10.0 – pneumothorax: tuberculous (confirmed)
  • 1B10.1 – pneumothorax: tuberculous (not confirmed)
  • CA44 – pyopneumothorax
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  • NB32.0 – Traumatic pneumothorax
  • 01 – Certain infectious or parasitic diseases
  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 19 – Certain conditions originating in the perinatal period
  • 20 – Congenital malformations, deformations and chromosomal abnormalities
  • 22 – Injury, poisoning or certain other consequences of external causes

Sibling codes

  • CB21.0 – Spontaneous tension pneumothorax
  • CB21.1 – Other spontaneous pneumothorax
  • CB21.Y – Other specified pneumothorax

Foundation entity

Pneumothorax – http://id.who.int/icd/entity/1946559257

Allowed postcoordination axes

Part of: CB21: Pneumothorax › 12: Diseases of the respiratory system