ICD-10-CM Code Y09

Assault by unspecified means

Version 2020 Billable Code

Valid for Submission

Y09 is a billable code used to specify a medical diagnosis of assault by unspecified means. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code Y09 might also be used to specify conditions or terms like assault, assault and battery, assault by person, battery, death due to assault and battery, death or significant injury of a patient or staff member resulting from a physical assault that occurs within or on the grounds of the healthcare facility, etc

Short Description:Assault by unspecified means
Long Description:Assault by unspecified means

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code Y09:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Assassination (attempted) NOS
  • Homicide (attempted) NOS
  • Manslaughter (attempted) NOS
  • Murder (attempted) NOS

Index of External Cause of Injuries

References found for the code Y09 in the External Cause of Injuries Index:

    • Assault(homicidal) (by) (in)
    • Assault(homicidal) (by) (in)
      • injury
    • Assault(homicidal) (by) (in)
      • violence
    • Assault(homicidal) (by) (in)
      • weapon
    • Assault(homicidal) (by) (in)
      • wound
    • Injury, injured(accidental(ly)) NOS
      • homicide


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Assault
  • Assault and battery
  • Assault by person
  • Battery
  • Death due to assault AND battery
  • Death or significant injury of a patient or staff member resulting from a physical assault that occurs within or on the grounds of the healthcare facility
  • Euthanasia
  • Exposure to attack by other person
  • First degree murder
  • Fratricide
  • Gangland style homicide
  • Homicide
  • Homicide and assault by fight, brawl and rape
  • Homicide attempt
  • Homicide by overkill
  • Infanticide
  • Justifiable homicide
  • Killing
  • Late effect due to homicide attempt
  • Late effects of assault
  • Manslaughter
  • Matricide
  • Murder
  • Murder by hired killer
  • Murder of acquaintance
  • Murder of friend
  • Murder of relative
  • Murder of spouse
  • Murder of stranger
  • Non-judicial execution
  • Patricide
  • Second degree murder
  • Serial killing
  • Serious reportable event associated with criminal activity
  • Sororicide
  • Traumatic injury due to assault
  • Undetermined manner of death
  • Undetermined manner of death, homicide suspected
  • Unlawful killing

Convert Y09 to ICD-9

Code Classification

  • External causes of morbidity and mortality (V01–Y98)
    • Assault (X92-Y09)
      • Assault by unspecified means (Y09)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020