Exposure to high and low air pressure and changes in air pressure

This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.

• exposure to:
• failure in dosage of radiation or temperature during surgical and medical care (Y63.2-Y63.5)
• lightning (T75.0-)
• natural cold (X31)
• natural heat (X30)
• natural radiation NOS (X39)
• radiological procedure and radiotherapy (Y84.2)
• sunlight (X32)