Y04.0 — Assault by unarmed brawl or fight
Is Y04.0 billable?
No — Y04.0 is a non-billable header code. Y04.0 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 3 billable codes beneath Y04.0.
Y04.0 at a glance
| Code | Y04.0 |
|---|---|
| Description | Assault by unarmed brawl or fight |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is Y04.0 listed in the External Cause Index?
These are the routes through the External Cause of Injuries Index that lead to Y04.0 — how the injury happened, rather than what the injury was.
- Brawl (hand) (fists) (foot)
- Manhandling (in brawl, fight)
- Assault › brawl (homicidal) (by) (in)
- Assault › fight (homicidal) (by) (in)
- Twisted by person › with intent to injure or kill (s) (accidentally)
- Twisted by person › assault (s) (accidentally)
- Twisted by person › homicide (s) (accidentally)
- Assault › bodily force › unarmed fight (homicidal) (by) (in)
- Injury, injuredNOS › due to, in › fight (accidental(ly))
- Kicked by › person › with intent to injure or kill
- Kicked by › person › assault
- Kicked by › person › homicide
Excludes1 — never code together — inherited from X92-Y09
The conditions below can never be reported together with Y04.0 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes1 — never code together — inherited from Y04
The conditions below can never be reported together with Y04.0 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
What codes fall under Y04.0? (3)
How long has Y04.0 existed?
Y04.0 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.