2020 ICD-10-CM Diagnosis Code X99.1

Assault by knife

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • X99.1 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM X99.1 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of X99.1 - other international versions of ICD-10 X99.1 may differ.
ICD-10-CM Coding Rules
  • X99.1 describes the circumstance causing an injury, not the nature of the injury.
The following code(s) above X99.1 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 X99.1:
  • V00-Y99
    2020 ICD-10-CM Range V00-Y99

    External causes of morbidity

    Note
    • 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
    2020 ICD-10-CM Range X92-Y09

    Assault

    Includes
    • 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.-)
    Assault
  • X99
    ICD-10-CM Diagnosis Code X99

    Assault by sharp object

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • assault by strike by sports equipment (Y08.0-)
    Assault by sharp object
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

External Cause Index entries containing back-references to X99.1:
  • Assault (homicidal) (by) (in) Y09
    ICD-10-CM Diagnosis Code Y09

    Assault by unspecified means

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Assassination (attempted) NOS
    • Homicide (attempted) NOS
    • Manslaughter (attempted) NOS
    • Murder (attempted) NOS
    • cutting or piercing instrument X99.9
      ICD-10-CM Diagnosis Code X99.9

      Assault by unspecified sharp object

        2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
      Applicable To
      • Assault by stabbing NOS
      • knife X99.1
    • wound Y09
      ICD-10-CM Diagnosis Code Y09

      Assault by unspecified means

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Assassination (attempted) NOS
      • Homicide (attempted) NOS
      • Manslaughter (attempted) NOS
      • Murder (attempted) NOS
      • knife X99.1
    • knife X99.1
  • Contact (accidental)
    • with
      • knife W26.0
        ICD-10-CM Diagnosis Code W26.0

        Contact with knife

          2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
        Type 1 Excludes
        • contact with electric knife (W29.1)
        • assault X99.1

ICD-10-CM Codes Adjacent To X99.1
X98.8XXS …… sequela
X98.9 Assault by unspecified hot objects
X98.9XXA …… initial encounter
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

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