Assault by bodily force
In Assault (X92-Y09), chapter 20: External Causes of Morbidity
12 billable codes under Y04: none are a CC or MCC; none map to an HCC.
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Instructional notes
Also applies, from Assault (X92-Y09)
These notes sit on X92-Y09 and apply to every code under it, including Y04.
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers how to report external cause codes (V00-Y99) describing cause, intent, place, activity, and status. They are never principal or first-listed, and reporting is voluntary unless required.
- General External Cause Coding Guidelines (page 88)
- Place of Occurrence Guideline (page 89)
- Activity Code (page 89)
- Place of Occurrence, Activity, and Status Codes Used with other External Cause Code (page 89)
- If the Reporting Format Limits the Number of External Cause Codes (page 90)
- Multiple External Cause Coding Guidelines (page 90)
- Child and Adult Abuse Guideline (page 90)
- Unknown or Undetermined Intent Guideline (page 91)
All codes under Y04
Y04 can't be used on a claim. Pick a billable code below; grey headings group them.
- Y04.0Assault by unarmed brawl or fight
- Y04.0XXAAssault by unarmed brawl or fight, initial encounter
- Y04.0XXDAssault by unarmed brawl or fight, subsequent encounter
- Y04.0XXSAssault by unarmed brawl or fight, sequela
- Y04.1Assault by human bite
- Y04.1XXAAssault by human bite, initial encounter
- Y04.1XXDAssault by human bite, subsequent encounter
- Y04.1XXSAssault by human bite, sequela
- Y04.2Assault by strike against or bumped into by another person
- Y04.2XXAAssault by strike against or bumped into by another person, initial encounter
- Y04.2XXDAssault by strike against or bumped into by another person, subsequent encounter
- Y04.2XXSAssault by strike against or bumped into by another person, sequela
- Y04.8Assault by other bodily force
- Y04.8XXAAssault by other bodily force, initial encounter
- Y04.8XXDAssault by other bodily force, subsequent encounter
- Y04.8XXSAssault by other bodily force, sequela
Y04 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
Other codes that refer to Y04
Notes on these codes point to Y04.
- W50 Excludes1: assault by bodily force (Y04)
Code history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.