W94.1Non-billable (header)

Exposure to prolonged low air pressure

Sub-codes of W94.1(2)

W94.1 is a non-billable header. Select a sub-code to bill. Sub-codes marked ⚠ require a 7th character — append A, D, or S (and an X placeholder if needed).

W94.11Exposure to residence or prolonged visit at high altitude⚠ 7th charW94.12Exposure to other prolonged low air pressure⚠ 7th char

Code Hierarchy

┌20External causes of morbidity (V00-Y99)├W85-W99Exposure to electric current, radiation and extreme ambient air temperature and pressure (W85-W99)├W94Exposure to high and low air pressure and changes in air pressure
└W94.1Exposure to prolonged low air pressure

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