Skip to content
Dx

ICD-10-CM 2027 diagnosis code

Y04.8XXAAssault by other bodily force, initial encounter

✓ Billable / specificRequires 7th character

Y04.8XXA is a valid, billable ICD-10-CM code for assault by other bodily force, initial encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 Y04.8XXA

Y04.8XXA is the ICD-10-CM diagnosis code for assault by other bodily force, initial encounter. It belongs to category Y04 (assault by bodily force), block X92-Y09 (assault) and chapter 20 (external causes of morbidity). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

The 7th character "A" means initial encounter: use it while the patient is receiving active treatment for the condition.

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

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

Before ICD-10, this condition was coded in ICD-9-CM as E960.0 (unarmed fight or brawl).

7th character

Ainitial encounter

Other encounter types for Y04.8:

Notes that apply from higher levels

Instructions written at a parent level also apply to Y04.8XXA.

› From Y04 Assault by bodily force
Excludes1

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

ICD-9-CM equivalent

Converter →
  • E960.0Unarmed fight or brawlapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

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 Y04.8XXA

Is Y04.8XXA billable?

Yes. Y04.8XXA is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

What does the "A" at the end of Y04.8XXA mean?

It is the 7th character for initial encounter. Per the official guidelines, use it while the patient is receiving active treatment for the condition.

Can Y04.8XXA be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Y04.8XXA as a principal diagnosis.

Is Y04.8XXA a CC or MCC?

No. Y04.8XXA is neither a CC nor an MCC under MS-DRG v44.0.

What is the ICD-9 code for Y04.8XXA?

The CMS General Equivalence Mappings map Y04.8XXA to ICD-9-CM E960.0.