W94 — Exposure to high and low air pressure and changes in air pressure
Not billable
Is W94 billable?
No — W94 is a non-billable header code. W94 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 30 billable codes beneath W94.
Billable codes under this header
- W94.0XXAExposure to prolonged high air pressure, initial encounter
- W94.0XXDExposure to prolonged high air pressure, subsequent encounter
- W94.0XXSExposure to prolonged high air pressure, sequela
- W94.11XAExposure to residence or prolonged visit at high altitude, initial encounter
- W94.11XDExposure to residence or prolonged visit at high altitude, subsequent encounter
- W94.11XSExposure to residence or prolonged visit at high altitude, sequela
- W94.12XAExposure to other prolonged low air pressure, initial encounter
- W94.12XDExposure to other prolonged low air pressure, subsequent encounter
- W94.12XSExposure to other prolonged low air pressure, sequela
- W94.21XAExposure to reduction in atmospheric pressure while surfacing from deep-water diving, initial encounter
- W94.21XDExposure to reduction in atmospheric pressure while surfacing from deep-water diving, subsequent encounter
- W94.21XSExposure to reduction in atmospheric pressure while surfacing from deep-water diving, sequela
- W94.22XAExposure to reduction in atmospheric pressure while surfacing from underground, initial encounter
- W94.22XDExposure to reduction in atmospheric pressure while surfacing from underground, subsequent encounter
- W94.22XSExposure to reduction in atmospheric pressure while surfacing from underground, sequela
- W94.23XAExposure to sudden change in air pressure in aircraft during ascent, initial encounter
- W94.23XDExposure to sudden change in air pressure in aircraft during ascent, subsequent encounter
- W94.23XSExposure to sudden change in air pressure in aircraft during ascent, sequela
- W94.29XAExposure to other rapid changes in air pressure during ascent, initial encounter
- W94.29XDExposure to other rapid changes in air pressure during ascent, subsequent encounter
- W94.29XSExposure to other rapid changes in air pressure during ascent, sequela
- W94.31XAExposure to sudden change in air pressure in aircraft during descent, initial encounter
- W94.31XDExposure to sudden change in air pressure in aircraft during descent, subsequent encounter
- W94.31XSExposure to sudden change in air pressure in aircraft during descent, sequela
- W94.32XAExposure to high air pressure from rapid descent in water, initial encounter
- W94.32XDExposure to high air pressure from rapid descent in water, subsequent encounter
- W94.32XSExposure to high air pressure from rapid descent in water, sequela
- W94.39XAExposure to other rapid changes in air pressure during descent, initial encounter
- W94.39XDExposure to other rapid changes in air pressure during descent, subsequent encounter
- W94.39XSExposure to other rapid changes in air pressure during descent, sequela
W94 at a glance
| Code | W94 |
|---|---|
| Description | Exposure to high and low air pressure and changes in air pressure |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together — inherited from W85-W99
The conditions below can never be reported together with W94 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
What codes fall under W94? (4)
How long has W94 existed?
W94 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.