W94 Expsr to high and low air pressr and changes in air pressure
ICD-10-CM category W94 sits in Chapter 20 (External causes of morbidity, V00-Y99). It contains 30 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.
Subcategories
W94.0 Exposure to prolonged high air pressureW94.1 Exposure to prolonged low air pressureW94.11 Exposure to residence or prolonged visit at high altitudeW94.12 Exposure to other prolonged low air pressureW94.2 Exposure to rapid changes in air pressure during ascentW94.21 Expsr to rdct in atmos pressr while surfc from dp-watr divW94.22 Expsr to rdct in atmos pressr while surfc from undergroundW94.23 Exposure to chng in air pressure in aircraft during ascentW94.29 Exposure to oth rapid changes in air pressure during ascentW94.3 Exposure to rapid changes in air pressure during descentW94.31 Exposure to chng in air pressure in aircraft during descentW94.32 Exposure to high air pressure from rapid descent in waterW94.39 Exposure to oth rapid changes in air pressure during descent
Billable codes in W94
| Code | Description |
|---|---|
W94.0XXA | Exposure to prolonged high air pressure, initial encounter |
W94.0XXD | Exposure to prolonged high air pressure, subsequent encounter |
W94.0XXS | Exposure to prolonged high air pressure, sequela |
W94.11XA | Exposure to residence or prolonged visit at high altitude, initial encounter |
W94.11XD | Exposure to residence or prolonged visit at high altitude, subsequent encounter |
W94.11XS | Exposure to residence or prolonged visit at high altitude, sequela |
W94.12XA | Exposure to other prolonged low air pressure, initial encounter |
W94.12XD | Exposure to other prolonged low air pressure, subsequent encounter |
W94.12XS | Exposure to other prolonged low air pressure, sequela |
W94.21XA | Exposure to reduction in atmospheric pressure while surfacing from deep-water diving, initial encounter |
W94.21XD | Exposure to reduction in atmospheric pressure while surfacing from deep-water diving, subsequent encounter |
W94.21XS | Exposure to reduction in atmospheric pressure while surfacing from deep-water diving, sequela |
W94.22XA | Exposure to reduction in atmospheric pressure while surfacing from underground, initial encounter |
W94.22XD | Exposure to reduction in atmospheric pressure while surfacing from underground, subsequent encounter |
W94.22XS | Exposure to reduction in atmospheric pressure while surfacing from underground, sequela |
W94.23XA | Exposure to sudden change in air pressure in aircraft during ascent, initial encounter |
W94.23XD | Exposure to sudden change in air pressure in aircraft during ascent, subsequent encounter |
W94.23XS | Exposure to sudden change in air pressure in aircraft during ascent, sequela |
W94.29XA | Exposure to other rapid changes in air pressure during ascent, initial encounter |
W94.29XD | Exposure to other rapid changes in air pressure during ascent, subsequent encounter |
W94.29XS | Exposure to other rapid changes in air pressure during ascent, sequela |
W94.31XA | Exposure to sudden change in air pressure in aircraft during descent, initial encounter |
W94.31XD | Exposure to sudden change in air pressure in aircraft during descent, subsequent encounter |
W94.31XS | Exposure to sudden change in air pressure in aircraft during descent, sequela |
W94.32XA | Exposure to high air pressure from rapid descent in water, initial encounter |
W94.32XD | Exposure to high air pressure from rapid descent in water, subsequent encounter |
W94.32XS | Exposure to high air pressure from rapid descent in water, sequela |
W94.39XA | Exposure to other rapid changes in air pressure during descent, initial encounter |
W94.39XD | Exposure to other rapid changes in air pressure during descent, subsequent encounter |
W94.39XS | Exposure to other rapid changes in air pressure during descent, sequela |
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