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Y09 ICD-10-CA code: Assault by unspecified means

Y09 is the ICD-10-CA code for “Assault by unspecified means” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

Y09

Assault by unspecified means

ICD-10-CA · Canada

Index terms

Entries in CIHI’s alphabetical index that lead to Y09. Searching the index by the condition the note names is how coders reach this code.

  • Lynching
  • Infanticide
  • Murder (attempt)
  • Homicide (attempt)
  • Assassination (attempt)
  • Manslaughter (nonaccidental)
  • Assault (homicidal) (by) (in)
  • Assault (homicidal) (by) (in), wound
  • Assault (homicidal) (by) (in), injury NEC
  • Assault (homicidal) (by) (in), weapon NEC
  • Assault (homicidal) (by) (in), violence NEC
  • Injury, injured (accidental(ly)) NEC, homicide
  • Injury, injured (accidental(ly)) NEC, by, caused by, from, assault
  • Injury, injured (accidental(ly)) NEC, purposely (inflicted) by other person(s)
  • Assault (homicidal) (by) (in), fight (hand) (fists) (foot) (unarmed), with weapon NEC
  • Killed, killing (accidentally) NEC, in, brawl, fight (hand) (fists) (foot), by weapon
  • Injury, injured (accidental(ly)) NEC, inflicted (by), other person, stated as, intentional, homicide (attempt)

Notes for Y09

As CIHI prints them, with any note Y09 takes from the headings above it.

Includes

  • Assassination (attempt) NOShomicidemanslaughter (nonaccidental)murder
  • Homicideinjuries inflicted by another person with intent to injure or kill, by any meansFrom X85-Y09 Assault

Use additional code

Add a code for this detail when the note documents it.

  • Use additional code from category U98.- to identify place of occurrence.From X85-Y09 Assault

Excludes

Conditions classified elsewhere.

  • Injuries due to:• legal intervention (Y35.-)• operations of war (Y36.-)From X85-Y09 Assault

Note

  • This chapter, which in previous revisions of ICD constituted a supplementary classification, permits the classification of environmental events and circumstances as the cause of injury, poisoning and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used in addition to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter XIX, Injury, poisoning and certain other consequences of external causes (S00-T98). Causes of death should preferably be tabulated according to both Chapter XIX and Chapter XX, but if only one code is tabulated then the code from Chapter XX should be used in preference. 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 XX should be used to provide additional information for multiple-condition analysis only.From Chapter 20: External causes of morbidity and mortality (V01-Y98)

Where Y09 sits

  1. 1ChapterChapter 20: External causes of morbidity and mortality (V01-Y98)
  2. 2Block X85-Y09Assault
  3. 3Valid code Y09Assault by unspecified means

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See Y09 in the CIHI source

Frequently asked questions

What does ICD-10-CA code Y09 mean?

Y09 is the ICD-10-CA code for “Assault by unspecified means” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is Y09 in ICD-10-CA?

Y09 sits under X85-Y09 Assault, within Chapter 20: External causes of morbidity and mortality (V01-Y98).

What coding notes apply to Y09?

ICD-10-CA lists Includes, Use additional code, Excludes, Note notes for Y09, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside Y09

X85Assault by drugs, medicaments and biological substancesX86Assault by corrosive substanceX87Assault by pesticidesX88Assault by carbon monoxide and other gases and vapoursX89Assault by other specified chemicals and noxious substancesX90Assault by unspecified chemical or noxious substanceX91Assault by hanging, strangulation and suffocationX92Assault by drowning and submersionX93Assault by handgun dischargeX94Assault by rifle, shotgun and larger firearm dischargeX95Assault by other and unspecified firearm dischargeX96Assault by explosive materialX97Assault by smoke, fire and flamesX98Assault by steam, hot vapours and hot objectsX99Assault by sharp objectY00Assault by blunt objectY01Assault by pushing from high placeY02Assault by pushing or placing victim before moving objectY03Assault by crashing of motor vehicleY04Assault by bodily forceY05Sexual assault by bodily forceY06Neglect and abandonmentY07Other maltreatmentY08Assault by other specified means