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Dx

ICD-10-CM 2027 diagnosis code

Y04.2Assault by strike against or bumped into by another person

Not billable — use a more specific codeRequires 7th character

Y04.2 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Y04.2

Y04.2 is the ICD-10-CM diagnosis code for assault by strike against or bumped into by another person. It belongs to category Y04 (assault by bodily force), block X92-Y09 (assault) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within Y04 (assault by bodily force), Y04.2 is specifically for assault by strike against or bumped into by another person. Related codes cover unarmed brawl or fight (Y04.0), human bite (Y04.1) and other bodily force (Y04.8).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

The appropriate 7th character is to be added to each code from category Y04

Notes that apply from higher levels

Instructions written at a parent level also apply to Y04.2.

› From Y04 Assault by bodily force
Excludes1

Broader instructions also apply from X92-Y09 Assault and Chapter 20: External causes of morbidity.

Alphabetic index entries

8 entries

Terms in the official ICD-10-CM index that lead to Y04.2.

Codes whose notes reference Y04.2

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about Y04.2

Is Y04.2 billable?

No. Y04.2 is a header code. Report one of its more specific subcodes instead.