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ICD-10-CM 2027 diagnosis code

X99.8XXDAssault by other sharp object, subsequent encounter

✓ Billable / specificPOA exemptRequires 7th character

X99.8XXD is a valid, billable ICD-10-CM code for assault by other sharp object, subsequent 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 X99.8XXD

X99.8XXD is the ICD-10-CM diagnosis code for assault by other sharp object, subsequent 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 "D" means subsequent encounter: use it for encounters after active treatment, while the patient is healing or recovering.

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

It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.

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

Dsubsequent encounter

Other encounter types for X99.8:

Notes that apply from higher levels

Instructions written at a parent level also apply to X99.8XXD.

› 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 X99.8XXD

Is X99.8XXD billable?

Yes. X99.8XXD is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

What does the "D" at the end of X99.8XXD mean?

It is the 7th character for subsequent encounter. Per the official guidelines, use it for encounters after active treatment, while the patient is healing or recovering.

Can X99.8XXD be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict X99.8XXD as a principal diagnosis.

Is X99.8XXD a CC or MCC?

No. X99.8XXD is neither a CC nor an MCC under MS-DRG v44.0.

What is the ICD-9 code for X99.8XXD?

The CMS General Equivalence Mappings map X99.8XXD to ICD-9-CM E966.