W94.22XA — Exposure to reduction in atmospheric pressure while surfacing from underground, initial encounter
Is W94.22XA billable?
Yes — W94.22XA is billable for FY2027. W94.22XA is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. W94.22XA may be submitted for encounters from October 1, 2026 through September 30, 2027.
W94.22XA at a glance
| Code | W94.22XA |
|---|---|
| Description | Exposure to reduction in atmospheric pressure while surfacing from underground, initial encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "A" | initial encounter |
What does the 7th character "A" mean in W94.22XA?
In W94.22XA, the 7th character A means initial encounter. The 7th character is required for W94.22XA to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
How is W94.22XA listed in the External Cause Index?
The External Cause of Injuries Index lists these routes under W94.22, the nearest indexed parent of W94.22XA. 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 › underground
Excludes1 — never code together — inherited from W85-W99
The conditions below can never be reported together with W94.22XA 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 W94.22XA existed?
W94.22XA 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.