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 electric current, radiation and extreme ambient air temperature and pressure (W85-W99)

Excludes 1:
exposure to:
failure in dosage of radiation or temperature during surgical and medical care (Y63.2-Y63.5)
lightning (T75.0-)
natural cold (X31)
natural heat (X30)
natural radiation NOS (X39)
radiological procedure and radiotherapy (Y84.2)
sunlight (X32)
W85 Exposure to electric transmission lines
Broken power line
The appropriate 7th character is to be added to code W85
A - initial encounter
D - subsequent encounter
S - sequela
W86 Exposure to other specified electric current [+]
The appropriate 7th character is to be added to each code from category W86
A - initial encounter
D - subsequent encounter
S - sequela
W88 Exposure to ionizing radiation [+]
Excludes 1: exposure to sunlight (X32)
The appropriate 7th character is to be added to each code from category W88
A - initial encounter
D - subsequent encounter
S - sequela
W89 Exposure to man-made visible and ultraviolet light [+]
Includes: exposure to welding light (arc)
Excludes 2: exposure to sunlight (X32)
The appropriate 7th character is to be added to each code from category W89
A - initial encounter
D - subsequent encounter
S - sequela
W90 Exposure to other nonionizing radiation [+]
Excludes 2: exposure to sunlight (X32)
The appropriate 7th character is to be added to each code from category W90
A - initial encounter
D - subsequent encounter
S - sequela
W92 Exposure to excessive heat of man-made origin
The appropriate 7th character is to be added to code W92
A - initial encounter
D - subsequent encounter
S - sequela
W93 Exposure to excessive cold of man-made origin [+]
The appropriate 7th character is to be added to each code from category W93
A - initial encounter
D - subsequent encounter
S - sequela
W94 Exposure to high and low air pressure and changes in air pressure [+]
The appropriate 7th character is to be added to each code from category W94
A - initial encounter
D - subsequent encounter
S - sequela
W99 Exposure to other man-made environmental factors
The appropriate 7th character is to be added to code W99
A - initial encounter
D - subsequent encounter
S - sequela

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