2021 ICD-10-CM Diagnosis Code X99.1XXS

Assault by knife, sequela

    2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
  • X99.1XXS is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM X99.1XXS became effective on October 1, 2020.
  • This is the American ICD-10-CM version of X99.1XXS - other international versions of ICD-10 X99.1XXS may differ.
ICD-10-CM Coding Rules
  • X99.1XXS describes the circumstance causing an injury, not the nature of the injury.
The following code(s) above X99.1XXS contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to X99.1XXS:
  • V00-Y99
    2021 ICD-10-CM Range V00-Y99

    External causes of morbidity

    • This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.
    External causes of morbidity
  • X92-Y09
    2021 ICD-10-CM Range X92-Y09


    • homicide
    • injuries inflicted by another person with intent to injure or kill, by any means
    Type 1 Excludes
    • injuries due to legal intervention (Y35.-)
    • injuries due to operations of war (Y36.-)
    • injuries due to terrorism (Y38.-)
  • X99
    ICD-10-CM Diagnosis Code X99

    Assault by sharp object

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • assault by strike by sports equipment (Y08.0-)
    Assault by sharp object
Present On Admission
POA Help
"Present On Admission" is defined as present at the time the order for inpatient admission occurs — conditions that develop during an outpatient encounter, including emergency department, observation, or outpatient surgery, are considered POA.
  • X99.1XXS is considered exempt from POA reporting.

Convert X99.1XXS to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
ICD-10-CM Codes Adjacent To X99.1XXS
X98.9XXD …… subsequent encounter
X98.9XXS …… sequela
X99 Assault by sharp object
X99.0 Assault by sharp glass
X99.0XXA …… initial encounter
X99.0XXD …… subsequent encounter
X99.0XXS …… sequela
X99.1 Assault by knife
X99.1XXA …… initial encounter
X99.1XXD …… subsequent encounter
X99.1XXS …… sequela
X99.2 Assault by sword or dagger
X99.2XXA …… initial encounter
X99.2XXD …… subsequent encounter
X99.2XXS …… sequela
X99.8 Assault by other sharp object
X99.8XXA …… initial encounter
X99.8XXD …… subsequent encounter
X99.8XXS …… sequela
X99.9 Assault by unspecified sharp object
X99.9XXA …… initial encounter

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.