Y04
⚠ Non-billable
Assault by bodily force
ICD-10-CM · FY2026 · External Causes of Morbidity
Code
Y04
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
External Causes of Morbidity
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code Y04?
ICD-10-CM code Y04 represents Assault by bodily force. It is a non-billable header code requiring a more specific subcategory in the External Causes of Morbidity chapter, effective October 1, 2025 – September 30, 2026.
Is Y04 billable?
No. Y04 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is Y04 in?
Y04 belongs to the External Causes of Morbidity chapter (V00–Y99) of ICD-10-CM.
Related codes in the Y04 category
Y04.0
Assault by unarmed brawl or fight
Non-billable
Y04.1
Assault by human bite
Non-billable
Y04.2
Assault by strike against or bumped into by another person
Non-billable
Y04.8
Assault by other bodily force
Non-billable
Y04.0XXA
Assault by unarmed brawl or fight, initial encounter
Billable
Y04.0XXD
Assault by unarmed brawl or fight, subsequent encounter
Billable
Y04.0XXS
Assault by unarmed brawl or fight, sequela
Billable
Y04.1XXA
Assault by human bite, initial encounter
Billable
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