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Y04.2

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

Non-billable headerICD-10-CM

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

Excludes1 inherited from the categories above Y04.2

A category’s note binds every code beneath it.

Written on Y04: Assault by bodily force

Other codes that can never be billed with Y04.2

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • 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

No CMS-HCC V28 category: this code does not change a RAF score.

Alphabetic index entries that lead here

  • 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 history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead Y04.2

3 child codes. Green means billable.

Other codes under Y04

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.