W42
W42 — Exposure to noise
Non-billable headerICD-10-CM
W42 is a non-billable header ICD-10-CM code for exposure to noise. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.
This code requires a 7th character
The appropriate 7th character is to be added to each code from category W42
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Risk adjustment
W42 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code to one of these instead W42
2 child codes. Green means billable.
Questions about W42
- Is W42 a billable ICD-10-CM code?
- No. W42 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does W42 sit in the tabular list?
- External causes of morbidity (V00-Y99), in the block Exposure to inanimate mechanical forces (W20-W49).