W94.2 — Exposure to rapid changes in air pressure during ascent
Not billable
Is W94.2 billable?
No — W94.2 is a non-billable header code. W94.2 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 12 billable codes beneath W94.2.
Billable codes under this header
- 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
W94.2 at a glance
| Code | W94.2 |
|---|---|
| Description | Exposure to rapid changes in air pressure during ascent |
| 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 W94.2 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 W94.2? (4)
- W94.21Exposure to reduction in atmospheric pressure while surfacing from deep-water divingnot billable
- W94.22Exposure to reduction in atmospheric pressure while surfacing from undergroundnot billable
- W94.23Exposure to sudden change in air pressure in aircraft during ascentnot billable
- W94.29Exposure to other rapid changes in air pressure during ascentnot billable
How long has W94.2 existed?
W94.2 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.