2026 ICD-10-CM Diagnosis Code W42Exposure to noise

ICD-10-CM Codes›V01–Y99›W20-W49›W42

ICD-10-CM W42
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

W42 is a non-billable ICD-10-CM category code for exposure to noise, so it cannot be submitted on claims. Use a more specific code from this category instead, such as W42.0XXA, W42.0XXD, W42.0XXS, and W42.9XXA.

Code Identity

ICD-10-CM Code
W42
Billable Status
No — Non-Billable Category
Code Describes
Exposure to noise
Chapter
W20-W49
Exposure to inanimate mechanical forces

Code Classification

ChapterV01–Y99External causes of morbidity and mortality
SectionW20-W49Exposure to inanimate mechanical forces
CategoryW42Exposure to noise
This CodeW42Exposure to noise

Specific Coding for Exposure to noiseOverview

Non-specific codes like W42 require more characters. Use one of these billable codes instead:

  • W42.0 for Exposure to supersonic waves

  • W42.9 for Exposure to other noise

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

7th Character Note

  • The appropriate 7th character is to be added to each code from category W42

7th Character

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About W42Overview

Is W42 (Exposure to noise) a billable code?

No. This is a category header that groups the codes for exposure to noise, and headers cannot be submitted on claims. Claims for exposure to noise need a more specific code from this category, such as W42.0XXA, W42.0XXD, and W42.0XXS.