Y04.2 — Assault by strike against or bumped into by another person
Y04.2 is a non-billable header ICD-10-CM code for assault by strike against or bumped into by another person. 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 Y04
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Other codes that can never be billed with Y04.2
These codes carry an Excludes1 note pointing at Y04.2. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Y04.2 alone.
- W51Accidental striking against or bumped into by another person
- W51.XXXAAccidental striking against or bumped into by another person, initial encounter
- W51.XXXDAccidental striking against or bumped into by another person, subsequent encounter
- W51.XXXSAccidental striking against or bumped into by another person, sequela
Risk adjustment
Y04.2 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 Y04.2 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 Y04.2.
- Assault›bodily force›bumping into
- Assault›striking against›other person
- Bumping against, into›person›assault
- Bumping against, into›person›homicide(attempt)
- Striking against›person›assault
- Striking against›person›homicide(attempt)
- Struck by›other person›assault
- Struck by›other person›homicide(attempt)
Code to one of these instead Y04.2
3 child codes. Green means billable.
Related codes at this level
Codes that share Y04. If Y04.2 is not quite right, the correct code is usually one of these.
Questions about Y04.2
- Is Y04.2 a billable ICD-10-CM code?
- No. Y04.2 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does Y04.2 sit in the tabular list?
- External causes of morbidity (V00-Y99), in the block Assault (X92-Y09).