W42
⚠ Non-billable
Exposure to noise
ICD-10-CM · FY2026 · External Causes of Morbidity
Code
W42
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
External Causes of Morbidity
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code W42?
ICD-10-CM code W42 represents Exposure to noise. It is a non-billable header code requiring a more specific subcategory in the External Causes of Morbidity chapter, effective October 1, 2025 – September 30, 2026.
Is W42 billable?
No. W42 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is W42 in?
W42 belongs to the External Causes of Morbidity chapter (V00–Y99) of ICD-10-CM.
Related codes in the W42 category
W42.0
Exposure to supersonic waves
Non-billable
W42.9
Exposure to other noise
Non-billable
W42.0XXA
Exposure to supersonic waves, initial encounter
Billable
W42.0XXD
Exposure to supersonic waves, subsequent encounter
Billable
W42.0XXS
Exposure to supersonic waves, sequela
Billable
W42.9XXA
Exposure to other noise, initial encounter
Billable
W42.9XXD
Exposure to other noise, subsequent encounter
Billable
W42.9XXS
Exposure to other noise, sequela
Billable
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