▷ Upper respiratory tract disorders
    ▷ Certain lower respiratory tract diseases
    ▷ Lung infections
    ▷ Lung diseases due to external agents
    ▷ Respiratory diseases principally affecting the lung interstitium
    ▷ Pleural, diaphragm or mediastinal disorders
    ▷CB40 Certain diseases of the respiratory system
    ▷CB41 Respiratory failure
    ▷ Postprocedural disorders of the respiratory system