External causes of morbidity (V00-Y99)

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.

Exposure to inanimate mechanical forces (W20-W49)

Excludes 1:
assault (X92-Y09)
contact or collision with animals or persons (W50-W64)
exposure to inanimate mechanical forces involving military or war operations (Y36.-, Y37.-)
intentional self-harm (X71-X83)
W20 Struck by thrown, projected or falling object [+]
Code first any associated:
cataclysm (X34-X39)
lightning strike (T75.00)
Excludes 1: falling object in machinery accident (W24, W28-W31)
falling object in transport accident (V01-V99)
object set in motion by explosion (W35-W40)
object set in motion by firearm (W32-W34)
struck by thrown sports equipment (W21.-)
The appropriate 7th character is to be added to each code from category W20
A - initial encounter
D - subsequent encounter
S - sequela
W21 Striking against or struck by sports equipment [+]
Excludes 1: assault with sports equipment (Y08.0-)
striking against or struck by sports equipment with subsequent fall (W18.01)
The appropriate 7th character is to be added to each code from category W21
A - initial encounter
D - subsequent encounter
S - sequela
W22 Striking against or struck by other objects [+]
Excludes 1: striking against or struck by object with subsequent fall (W18.09)
The appropriate 7th character is to be added to each code from category W22
A - initial encounter
D - subsequent encounter
S - sequela
W23 Caught, crushed, jammed or pinched in or between objects [+]
Excludes 1: injury caused by cutting or piercing instruments (W25-W27)
injury caused by firearms malfunction (W32.1, W33.1-, W34.1-)
injury caused by lifting and transmission devices (W24.-)
injury caused by machinery (W28-W31)
injury caused by nonpowered hand tools (W27.-)
injury caused by transport vehicle being used as a means of transportation (V01-V99)
injury caused by struck by thrown, projected or falling object (W20.-)
The appropriate 7th character is to be added to each code from category W23
A - initial encounter
D - subsequent encounter
S - sequela
W24 Contact with lifting and transmission devices, not elsewhere classified [+]
Excludes 1: transport accidents (V01-V99)
The appropriate 7th character is to be added to each code from category W24
A - initial encounter
D - subsequent encounter
S - sequela
W25 Contact with sharp glass
Code first any associated:
injury due to flying glass from explosion or firearm discharge (W32-W40)
transport accident (V00-V99)
Excludes 1: fall on same level due to slipping, tripping and stumbling with subsequent striking against sharp glass (W01.110-)
striking against sharp glass with subsequent fall (W18.02-)
Excludes 2: glass embedded in skin (W45.-)
The appropriate 7th character is to be added to code W25
A - initial encounter
D - subsequent encounter
S - sequela
W26 Contact with other sharp objects [+]
Excludes 2: sharp object(s) embedded in skin (W45.-)
The appropriate 7th character is to be added to each code from category W26
A - initial encounter
D - subsequent encounter
S - sequela
W27 Contact with nonpowered hand tool [+]
The appropriate 7th character is to be added to each code from category W27
A - initial encounter
D - subsequent encounter
S - sequela
W28 Contact with powered lawn mower
Powered lawn mower (commercial) (residential)
Excludes 1: contact with nonpowered lawn mower (W27.1)
Excludes 2: exposure to electric current (W86.-)
The appropriate 7th character is to be added to code W28
A - initial encounter
D - subsequent encounter
S - sequela
W29 Contact with other powered hand tools and household machinery [+]
Excludes 1: contact with commercial machinery (W31.82)
contact with hot household appliance (X15)
contact with nonpowered hand tool (W27.-)
exposure to electric current (W86)
The appropriate 7th character is to be added to each code from category W29
A - initial encounter
D - subsequent encounter
S - sequela
W30 Contact with agricultural machinery [+]
Includes: animal-powered farm machine
Excludes 1: agricultural transport vehicle accident (V01-V99)
explosion of grain store (W40.8)
exposure to electric current (W86.-)
The appropriate 7th character is to be added to each code from category W30
A - initial encounter
D - subsequent encounter
S - sequela
W31 Contact with other and unspecified machinery [+]
Excludes 1: contact with agricultural machinery (W30.-)
contact with machinery in transport under own power or being towed by a vehicle (V01-V99)
exposure to electric current (W86)
The appropriate 7th character is to be added to each code from category W31
A - initial encounter
D - subsequent encounter
S - sequela
W32 Accidental handgun discharge and malfunction [+]
Includes: accidental discharge and malfunction of gun for single hand use
accidental discharge and malfunction of pistol
accidental discharge and malfunction of revolver
Handgun discharge and malfunction NOS
Excludes 1: accidental airgun discharge and malfunction (W34.010, W34.110)
accidental BB gun discharge and malfunction (W34.010, W34.110)
accidental pellet gun discharge and malfunction (W34.010, W34.110)
accidental shotgun discharge and malfunction (W33.01, W33.11)
assault by handgun discharge (X93)
handgun discharge involving legal intervention (Y35.0-)
handgun discharge involving military or war operations (Y36.4-)
intentional self-harm by handgun discharge (X72)
Very pistol discharge and malfunction (W34.09, W34.19)
The appropriate 7th character is to be added to each code from category W32
A - initial encounter
D - subsequent encounter
S - sequela
W33 Accidental rifle, shotgun and larger firearm discharge and malfunction [+]
Includes: rifle, shotgun and larger firearm discharge and malfunction NOS
Excludes 1: accidental airgun discharge and malfunction (W34.010, W34.110)
accidental BB gun discharge and malfunction (W34.010, W34.110)
accidental handgun discharge and malfunction (W32.-)
accidental pellet gun discharge and malfunction (W34.010, W34.110)
assault by rifle, shotgun and larger firearm discharge (X94)
firearm discharge involving legal intervention (Y35.0-)
firearm discharge involving military or war operations (Y36.4-)
intentional self-harm by rifle, shotgun and larger firearm discharge (X73)
The appropriate 7th character is to be added to each code from category W33
A - initial encounter
D - subsequent encounter
S - sequela
W34 Accidental discharge and malfunction from other and unspecified firearms and guns [+]
The appropriate 7th character is to be added to each code from category W34
A - initial encounter
D - subsequent encounter
S - sequela
W35 Explosion and rupture of boiler
Excludes 1: explosion and rupture of boiler on watercraft (V93.4)
The appropriate 7th character is to be added to code W35
A - initial encounter
D - subsequent encounter
S - sequela
W36 Explosion and rupture of gas cylinder [+]
The appropriate 7th character is to be added to each code from category W36
A - initial encounter
D - subsequent encounter
S - sequela
W37 Explosion and rupture of pressurized tire, pipe or hose [+]
The appropriate 7th character is to be added to each code from category W37
A - initial encounter
D - subsequent encounter
S - sequela
W38 Explosion and rupture of other specified pressurized devices
The appropriate 7th character is to be added to code W38
A - initial encounter
D - subsequent encounter
S - sequela
W39 Discharge of firework
The appropriate 7th character is to be added to code W39
A - initial encounter
D - subsequent encounter
S - sequela
W40 Explosion of other materials [+]
Excludes 1: assault by explosive material (X96)
explosion involving legal intervention (Y35.1-)
explosion involving military or war operations (Y36.0-, Y36.2-)
intentional self-harm by explosive material (X75)
The appropriate 7th character is to be added to each code from category W40
A - initial encounter
D - subsequent encounter
S - sequela
W42 Exposure to noise [+]
The appropriate 7th character is to be added to each code from category W42
A - initial encounter
D - subsequent encounter
S - sequela
W44 Foreign body entering into or through a natural orifice [+]
Excludes 2: contact with other sharp objects (W26)
contact with sharp glass (W25)
foreign body or object entering through skin (W45)
The appropriate 7th character is to be added to each code from category W44
A - initial encounter
D - subsequent encounter
S - sequela
W45 Foreign body or object entering through skin [+]
Includes: foreign body or object embedded in skin
nail embedded in skin
Excludes 2: contact with hand tools (nonpowered) (powered) (W27-W29)
contact with other sharp object(s) (W26.-)
contact with sharp glass (W25.-)
struck by objects (W20-W22)
The appropriate 7th character is to be added to each code from category W45
A - initial encounter
D - subsequent encounter
S - sequela
W46 Contact with hypodermic needle [+]
The appropriate 7th character is to be added to each code from category W46
A - initial encounter
D - subsequent encounter
S - sequela
W49 Exposure to other inanimate mechanical forces [+]
Includes: exposure to abnormal gravitational [G] forces
exposure to inanimate mechanical forces NEC
Excludes 1: exposure to inanimate mechanical forces involving military or war operations (Y36.-, Y37.-)
The appropriate 7th character is to be added to each code from category W49
A - initial encounter
D - subsequent encounter
S - sequela

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