2019 ICD-10-CM Diagnosis Code Y09

Assault by unspecified means

    2016 2017 2018 2019 Billable/Specific Code
  • Y09 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM Y09 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of Y09 - other international versions of ICD-10 Y09 may differ.
ICD-10-CM Coding Rules
  • Y09 describes the circumstance causing an injury, not the nature of the injury.
Applicable To
  • Assassination (attempted) NOS
  • Homicide (attempted) NOS
  • Manslaughter (attempted) NOS
  • Murder (attempted) NOS
The following code(s) above Y09 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 Y09:
  • V00-Y99
    2019 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
    2019 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.-)
Approximate Synonyms
  • Cause of injury, assault
  • Traumatic injury due to assault

Convert Y09 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

External Cause Index entries containing back-references to Y09:
  • Assault (homicidal) (by) (in) Y09
  • Injury, injured (accidental(ly)) X58
    ICD-10-CM Diagnosis Code X58

    Exposure to other specified factors

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Applicable To
    • Accident NOS
    • Exposure NOS

ICD-10-CM Codes Adjacent To Y09
Y08.09XS …… sequela
Y08.8 Assault by other specified means
Y08.81 Assault by crashing of aircraft
Y08.81XA …… initial encounter
Y08.81XD …… subsequent encounter
Y08.81XS …… sequela
Y08.89 Assault by other specified means
Y08.89XA …… initial encounter
Y08.89XD …… subsequent encounter
Y08.89XS …… sequela
Y09 Assault by unspecified means
Y21 Drowning and submersion, undetermined intent
Y21.0 Drowning and submersion while in bathtub, undetermined intent
Y21.0XXA …… initial encounter
Y21.0XXD …… subsequent encounter
Y21.0XXS …… sequela
Y21.1 Drowning and submersion after fall into bathtub, undetermined intent
Y21.1XXA …… initial encounter
Y21.1XXD …… subsequent encounter
Y21.1XXS …… sequela
Y21.2 Drowning and submersion while in swimming pool, undetermined intent

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