ICD-10-CM 2027 diagnosis code

W94Exposure to high and low air pressure and changes in air pressure

Not billable — use a more specific code

W94 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.Short description: Expsr to high and low air pressr and changes in air pressure

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About W94

W94 is the ICD-10-CM diagnosis code for exposure to high and low air pressure and changes in air pressure. It belongs to block W85-W99 (exposure to electric current, radiation and extreme ambient air temperature and pressure) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: W94.0 (pressure), W94.1 (pressure), W94.2 (ascent) and W94.3 (descent).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under W94

Notes that apply from higher levels

Instructions written at a parent level also apply to W94.

Broader instructions also apply from W85-W99 Exposure to electric current, radiation and extreme ambient air temperature and pressure and Chapter 20: External causes of morbidity.

Codes whose notes reference W94

V97.8Excludes1
W16Excludes1

Code history

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2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about W94

Is W94 billable?: No. W94 is a header code. Report one of its more specific subcodes instead.