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W85-W99 ICD-10-CA block: Exposure to electric current, radiation and extreme ambient air temperature and pressure

W85-W99 isn’t a code on its own. Choose one of the 11 codes beneath it, the one the documentation supports.

Official description

W85-W99

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

ICD-10-CA · Canada

Codes in W85-W99

W85-W99 isn’t a code on its own. Open the code that matches what the note documents.

W85Exposure to electric transmission linesW86Exposure to other specified electric currentW87Exposure to unspecified electric currentW88Exposure to ionizing radiationW89Exposure to man-made visible and ultraviolet lightW90Exposure to other nonionizing radiationW91Exposure to unspecified type of radiationW92Exposure to excessive heat of man-made originW93Exposure to excessive cold of man-made originW94Exposure to high and low air pressure and changes in air pressureW99Exposure to other and unspecified man-made environmental factors

Notes for W85-W99

As CIHI prints them, with any note W85-W99 takes from the headings above it.

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.

Excludes

Conditions classified elsewhere.

  • Abnormal reaction to a complication of treatment, without mention of misadventure (Y84.2)exposure to:• natural• cold (X31.-)• heat (X30.-)• radiation NOS (X39.-)• sunlight (X32.-)misadventure to patient in surgical and medical procedures (Y63.2 - Y63.5)victim of lightning (X33.-)

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 W85-W99 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 W85-W99Exposure to electric current, radiation and extreme ambient air temperature and pressure

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 W85-W99 in the CIHI source

Frequently asked questions

Is W85-W99 a valid ICD-10-CA code?

No. W85-W99 (Exposure to electric current, radiation and extreme ambient air temperature and pressure) is a block heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 11 codes; record the one the documentation supports.

Where is W85-W99 in ICD-10-CA?

W85-W99 sits under 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 W85-W99?

ICD-10-CA lists Use additional code, Excludes, Note notes for W85-W99, 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 W85-W99

W00-W19FallsW20-W49Exposure to inanimate mechanical forcesW50-W64Exposure to animate mechanical forcesW65-W74Accidental drowning and submersionW75-W84Other accidental threats to breathingX00-X09Exposure to smoke, fire and flamesX10-X19Contact with heat and hot substancesX20-X29Contact with venomous animals and plantsX30-X39Exposure to forces of natureX40-X49Accidental poisoning by and exposure to noxious substancesX50-X57Overexertion, travel and privationX58-X59Accidental exposure to other and unspecified factors