ICD-10-CM 2027 diagnosis code

W42.0Exposure to supersonic waves

Not billable — use a more specific codeRequires 7th character

W42.0 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About W42.0

W42.0 is the ICD-10-CM diagnosis code for exposure to supersonic waves. It belongs to category W42 (exposure to noise), block W20-W49 (exposure to inanimate mechanical forces) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within W42 (exposure to noise), W42.0 is specifically for exposure to supersonic waves. Related codes cover other noise (W42.9).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

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

Ainitial encounterW42.0XXA
Dsubsequent encounterW42.0XXD
SsequelaW42.0XXS

Notes that apply from higher levels

Instructions written at a parent level also apply to W42.0.

Broader instructions also apply from W20-W49 Exposure to inanimate mechanical forces and Chapter 20: External causes of morbidity.

Alphabetic index entries

6 entries

Terms in the official ICD-10-CM index that lead to W42.0.

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about W42.0

Is W42.0 billable?: No. W42.0 is a header code. Report one of its more specific subcodes instead.