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ICD-10-CM 2027 diagnosis code

X99.2XXAAssault by sword or dagger, initial encounter

✓ Billable / specificRequires 7th character

X99.2XXA is a valid, billable ICD-10-CM code for assault by sword or dagger, 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 X99.2XXA

X99.2XXA is the ICD-10-CM diagnosis code for assault by sword or dagger, initial encounter. It belongs to category X99 (assault by sharp object), 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 E966 (assault by cutting and piercing instrument).

7th character

Ainitial encounter

Other encounter types for X99.2:

Notes that apply from higher levels

Instructions written at a parent level also apply to X99.2XXA.

› From X99 Assault by sharp object
Excludes1
  • assault by strike by sports equipment (Y08.0-)

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

ICD-9-CM equivalent

Converter →
  • E966Assault by cutting and piercing instrumentapproximate

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 X99.2XXA

Is X99.2XXA billable?

Yes. X99.2XXA 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 X99.2XXA 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 X99.2XXA be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict X99.2XXA as a principal diagnosis.

Is X99.2XXA a CC or MCC?

No. X99.2XXA is neither a CC nor an MCC under MS-DRG v44.0.

What is the ICD-9 code for X99.2XXA?

The CMS General Equivalence Mappings map X99.2XXA to ICD-9-CM E966.