W94.21XS — Exposure to reduction in atmospheric pressure while surfacing from deep-water diving, sequela
Is W94.21XS billable?
Yes — W94.21XS is billable for FY2027. W94.21XS is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. W94.21XS may be submitted for encounters from October 1, 2026 through September 30, 2027.
W94.21XS at a glance
| Code | W94.21XS |
|---|---|
| Description | Exposure to reduction in atmospheric pressure while surfacing from deep-water diving, sequela |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "S" | sequela |
What does the 7th character "S" mean in W94.21XS?
In W94.21XS, the 7th character S means sequela. The 7th character is required for W94.21XS to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
How is W94.21XS listed in the External Cause Index?
The External Cause of Injuries Index lists these routes under W94.21, the nearest indexed parent of W94.21XS. This is a separate index from the Alphabetic Index and is where external cause codes are looked up.
- Air › pressure › change, rapid › during › ascent › while › deep water diving
Excludes1 — never code together — inherited from W85-W99
The conditions below can never be reported together with W94.21XS on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
How long has W94.21XS existed?
W94.21XS 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.