W42.0 — Exposure to supersonic waves
W42.0 is a non-billable header ICD-10-CM code for exposure to supersonic waves. 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
W42.0 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.
How W42.0 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to W42.0.
- Supersonic waves(causing injury)
- Exposure›supersonic waves
- Noise›supersonic
- Sound waves›supersonic
- Exposure›noise›supersonic
- Exposure›waves›supersonic
Code to one of these instead W42.0
3 child codes. Green means billable.
Related codes at this level
Codes that share W42. If W42.0 is not quite right, the correct code is usually one of these.
Questions about W42.0
- Is W42.0 a billable ICD-10-CM code?
- No. W42.0 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does W42.0 sit in the tabular list?
- External causes of morbidity (V00-Y99), in the block Exposure to inanimate mechanical forces (W20-W49).