W42: Exposure to noise
Codes under W42 (Exposure to noise). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| W42.0 | Exposure to supersonic waves | — |
| W42.0 | Exposure to supersonic waves | — |
| W42.0XXA | Exposure to supersonic waves, initial encounter | ✓ |
| W42.0XXA | Exposure to supersonic waves, initial encounter | ✓ |
| W42.0XXD | Exposure to supersonic waves, subsequent encounter | ✓ |
| W42.0XXD | Exposure to supersonic waves, subsequent encounter | ✓ |
| W42.0XXS | Exposure to supersonic waves, sequela | ✓ |
| W42.0XXS | Exposure to supersonic waves, sequela | ✓ |
| W42.9 | Exposure to other noise | — |
| W42.9 | Exposure to other noise | — |
| W42.9XXA | Exposure to other noise, initial encounter | ✓ |
| W42.9XXA | Exposure to other noise, initial encounter | ✓ |
| W42.9XXD | Exposure to other noise, subsequent encounter | ✓ |
| W42.9XXD | Exposure to other noise, subsequent encounter | ✓ |
| W42.9XXS | Exposure to other noise, sequela | ✓ |
| W42.9XXS | Exposure to other noise, sequela | ✓ |
Frequently asked questions
What is ICD-10-CM code W42?
W42 is an ICD-10-CM category covering Exposure to noise. It contains 16 more specific diagnosis codes, 12 of which are billable.
Is W42 a billable code?
No — W42 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example W42.0 — Exposure to supersonic waves). 12 of the 16 codes under W42 are billable.
What codes fall under W42?
W42 includes W42.0, W42.0, W42.0XXA, W42.0XXA, W42.0XXD, plus 11 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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