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Ch. 20: External causes of morbidity (V00-Y99)
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Exposure to inanimate mechanical forces (W20-W49)
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W42
Exposure to noise
ICD-10-CM category (non-billable header) code — part of Exposure to inanimate mechanical forces (W20-W49)
Code Details
Billable
No — use a more specific child code
Chapter
Chapter 20: External causes of morbidity (V00-Y99)
Section
Exposure to inanimate mechanical forces (W20-W49)
Valid 7th Characters
A
initial encounter
D
subsequent encounter
S
sequela
Coding Notes
7th Character Note
The appropriate 7th character is to be added to each code from category W42
Subcategories (2)
W42.0
Exposure to supersonic waves
W42.9
Exposure to other noise
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