W31.1 — Contact with metalworking machines
W31.1 is a non-billable header ICD-10-CM code for contact with metalworking machines. 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 W31
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Contact with abrasive wheel
- Contact with forging machine
- Contact with lathe
- Contact with mechanical shears
- Contact with metal drilling machine
- Contact with milling machine
- Contact with power press
- Contact with rolling-mill
- Contact with metal sawing machine
Risk adjustment
W31.1 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 W31.1 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 W31.1.
- Contact›with›abrasive wheel(metalworking)
- Contact›with›forging machine(metalworking)
- Contact›with›lathe(metalworking)
- Contact›with›sawing machine, metal
- Contact›with›machine, machinery›abrasive wheel
- Contact›with›machine, machinery›drilling, metal(industrial)
- Contact›with›machine, machinery›forging machine
- Contact›with›machine, machinery›lathe
- Contact›with›machine, machinery›metal drill
- Contact›with›machine, machinery›metalworking(industrial)
- Contact›with›machine, machinery›milling, metal
- Contact›with›machine, machinery›power press, metal
Code to one of these instead W31.1
3 child codes. Green means billable.
Related codes at this level
Codes that share W31. If W31.1 is not quite right, the correct code is usually one of these.
Questions about W31.1
- Is W31.1 a billable ICD-10-CM code?
- No. W31.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does W31.1 sit in the tabular list?
- External causes of morbidity (V00-Y99), in the block Exposure to inanimate mechanical forces (W20-W49).