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W20 ICD-10-CA code: Struck by thrown, projected or falling object(s)

W20 is the ICD-10-CA code for “Struck by thrown, projected or falling object(s)” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

W20

Struck by thrown, projected or falling object(s)

Short description: Struck by thrown or falling object

ICD-10-CA · Canada

Index terms

Entries in CIHI’s alphabetical index that lead to W20. Searching the index by the condition the note names is how coders reach this code.

  • Collapse, building
  • Collapse, structure
  • Fall, falling (accidental), rock
  • Fall, falling (accidental), stone
  • Fall, falling (accidental), object
  • Fall, falling (accidental), timber
  • Fall, falling (accidental), building
  • Fall, falling (accidental), structure
  • Struck (accidentally) by, object NEC, falling
  • Rock falling on or hitting (accidentally) person
  • Struck (accidentally) by, object NEC, moving NEC
  • Struck (accidentally) by, object NEC, thrown NEC
  • Tree falling on or hitting (accidentally) (person)
  • Crushed (accidentally), by, in, falling, object NEC
  • Struck (accidentally) by, object NEC, projected NEC
  • Fall, falling (accidental), tree (caused by lightning)
  • Striking against, object (stationary), moving, projected
  • Struck (accidentally) by, object NEC, falling, from, in, on, cave in
  • Struck (accidentally) by, object NEC, falling, from, in, on, building
  • Struck (accidentally) by, object NEC, falling, from, in, on, structure
  • Cave in (causing asphyxia, suffocation (by pressure)), without asphyxia or suffocation
  • Earth falling (on) (with asphyxia or suffocation (by pressure)), without asphyxia or suffocation
  • Crushed (accidentally), by, in, cave in (with asphyxia or suffocation), without asphyxia or suffocation
  • Struck (accidentally) by, vehicle (transport) NEC, stationary (falling from jack, hydraulic lift, ramp)
  • Struck (accidentally) by, object NEC, falling, from, in, on, transport vehicle (in motion) NEC, stationary
  • Crushed (accidentally), by, in, falling, earth, material (with asphyxia or suffocation), without asphyxia or suffocation

Notes for W20

As CIHI prints them, with any note W20 takes from the headings above it.

Includes

  • Cave-in without asphyxiation or suffocationcollapse of building, except on firefalling:• rock• stone• tree

Use additional code

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

Excludes

Conditions classified elsewhere.

  • Collapse or burning building (X00.-)falling object in:• cataclysm (X34-X39)• machinery accident (W24.-) (W28-W31)• transport accident (V01-V99)object set in motion by:• explosion (W35-W40)• firearm (W32-W34)sports equipment (W21.-)
  • Assault (X85-Y09)contact or collision with animals or persons (W50-W64)intentional self-harm (X60-X84)From W20-W49 Exposure to inanimate mechanical forces

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 W20 sits

  1. 1ChapterChapter 20: External causes of morbidity and mortality (V01-Y98)
  2. 2Block V01-X59Accidents
  3. 3Block W00-X59Other external causes of accidental injury
  4. 4Block W20-W49Exposure to inanimate mechanical forces
  5. 5Valid code W20Struck by thrown, projected or falling object(s)

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 W20 in the CIHI source

Frequently asked questions

What does ICD-10-CA code W20 mean?

W20 is the ICD-10-CA code for “Struck by thrown, projected or falling object(s)” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is W20 in ICD-10-CA?

W20 sits under W20-W49 Exposure to inanimate mechanical forces, within W00-X59 Other external causes of accidental injury, within V01-X59 Accidents, within Chapter 20: External causes of morbidity and mortality (V01-Y98).

What coding notes apply to W20?

ICD-10-CA lists Includes, Excludes, Use additional code, Note notes for W20, 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 W20

W21Striking against or struck by sports equipmentW22Striking against or struck by other object(s)W23Caught, crushed, jammed or pinched in or between objectsW24Contact with lifting and transmission device(s), not elsewhere classifiedW25Contact with sharp glassW26Contact with other sharp object(s)W27Contact with nonpowered hand toolW28Contact with powered lawnmowerW29Contact with other powered hand tools and household machineryW30Contact with agricultural machineryW31Contact with other and unspecified machineryW32Handgun dischargeW33Rifle, shotgun and larger firearm dischargeW34Discharge from other and unspecified firearmsW35Explosion and rupture of boilerW36Explosion and rupture of gas cylinderW37Explosion and rupture of pressurized tire, pipe or hoseW38Explosion and rupture of other specified pressurized devicesW39Discharge of fireworkW40Explosion of other materialsW41Exposure to high-pressure jetW42Exposure to noiseW43Exposure to vibrationW44Foreign body entering into or through eye or natural orificeW45Foreign body or object entering through skinW46Contact with hypodermic needleW49Exposure to other and unspecified inanimate mechanical forces