ICD-11 classes
12 Diseases of the respiratory system
Pleural, diaphragm or mediastinal disorders
CB21 — Pneumothorax

ICD-11 CB21 — Pneumothorax

Pneumothorax is an abnormal collection of air or gas in the pleural space that separates the lung from the chest wall, and that may interfere with normal breathing.

The diagnosis includes nothing.

It excludes 4 items.

  • pyopneumothorax (CA44)
  • pneumothorax: tuberculous (not confirmed) (1B10.1)
  • Traumatic pneumothorax (NB32.0)
  • pneumothorax: tuberculous (confirmed) (1B10.0)

Diagnosis with code CB21 contains 5 clarifying diagnoses:

  1. CB21.0 — Spontaneous tension pneumothorax
  2. CB21.1 — Other spontaneous pneumothorax
  3. KB27.1 — Pneumothorax originating in the perinatal period
  4. CB21.Y — Other specified pneumothorax
  5. CB21.Z — Pneumothorax, unspecified

The diagnosis is included in 1 another class.

  • Pneumothorax originating in the perinatal period (KB27.1)

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