W42.9XXD — Exposure to other noise, subsequent encounter
Is W42.9XXD billable?
Yes — W42.9XXD is billable for FY2027. W42.9XXD is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. W42.9XXD may be submitted for encounters from October 1, 2026 through September 30, 2027.
W42.9XXD at a glance
| Code | W42.9XXD |
|---|---|
| Description | Exposure to other noise, subsequent encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "D" | subsequent encounter |
What does the 7th character "D" mean in W42.9XXD?
In W42.9XXD, the 7th character D means subsequent encounter. The 7th character is required for W42.9XXD to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
How is W42.9XXD listed in the External Cause Index?
The External Cause of Injuries Index lists these routes under W42.9, the nearest indexed parent of W42.9XXD. This is a separate index from the Alphabetic Index and is where external cause codes are looked up.
- Noise (causing injury) (pollution)
- Sound waves (causing injury)
- Exposure › noise (to)
- Exposure › waves › sound (to)
Inclusion terms
Alternative wording in documentation that is classified to W42.9XXD.
- Exposure to sound waves NOS
Excludes1 — never code together — inherited from W20-W49
The conditions below can never be reported together with W42.9XXD 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 W42.9XXD existed?
W42.9XXD 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.