CB41.20

ICD-11 MMS 2026-01

Respiratory failure, unspecified, Type I

Description

This is when the PaCO2 may be normal or low. It is typically caused by a ventilation/perfusion (V/Q) mismatch; the volume of air flowing in and out of the lungs is not matched with the flow of blood to the lungs. The basic defect in type 1 respiratory failure is failure of oxygenation.

Index terms

  • Respiratory failure, unspecified, Type I
  • Hypoxic respiratory failure, Type I, unspecified
  • hypoxaemic respiratory failure
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  • hypoxic respiratory failure, unspecified
  • type 1 respiratory failure, unspecified

Exclusions from above levels

  • CB00 – Acute respiratory distress syndrome
  • KB23 – Respiratory distress of newborn
  • MD33 – Respiratory arrest
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  • 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

  • CB41.21 – Respiratory failure, unspecified, Type II
  • CB41.2Z – Respiratory failure, unspecified

Foundation entity

Respiratory failure, unspecified, Type I – http://id.who.int/icd/entity/1298895686

Allowed postcoordination axes

Part of: CB41.2: Respiratory failure, unspecified as acute or chronic › CB41: Respiratory failure › 12: Diseases of the respiratory system