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	—
W42.0XXA	Exposure to supersonic waves, initial encounter	✓
W42.0XXD	Exposure to supersonic waves, subsequent encounter	✓
W42.0XXS	Exposure to supersonic waves, sequela	✓
W42.9	Exposure to other noise	—
W42.9XXA	Exposure to other noise, initial encounter	✓
W42.9XXD	Exposure to other noise, subsequent encounter	✓
W42.9XXS	Exposure to other noise, sequela	✓

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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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