W94.21
W94.21: Exposure to reduction in atmospheric pressure while surfacing from deep-water diving
Non-billable headerICD-10-CM
W94.21 is a non-billable header ICD-10-CM code for exposure to reduction in atmospheric pressure while surfacing from deep-water diving. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.
This code requires a 7th character
The appropriate 7th character is to be added to each code from category W94
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Other codes that can never be billed with W94.21
Their own Excludes1 notes name this code, so the conflict is not listed above.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Alphabetic index entries that lead here
- Air›pressure›change, rapid›during›ascent›while›deep water diving
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead W94.21
3 child codes. Green means billable.
- 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