Try for free

Y17.4 ICD-10-CA code: Poisoning by and exposure to carbon monoxide from unspecified sources

Y17.4 is the ICD-10-CA code for “Poisoning by and exposure to carbon monoxide from unspecified sources” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

Y17.4

Poisoning by and exposure to carbon monoxide from unspecified sources

Short description: Poison carbn mono unspec sources

ICD-10-CA · Canada · Also written Y174

Notes for Y17.4

As CIHI prints them, with any note Y17.4 takes from the headings above it.

Use additional code

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

Excludes

Conditions classified elsewhere.

Note

  • This section covers events where available information is insufficient to enable a medical or legal authority to make a distinction between accident, self-harm and assault. It includes self-inflicted injuries, but not poisoning, when not specified whether accidental or with intent to harm(X40-X49)Follow legal rulings when available.From Y10-Y34 Event of undetermined intent
  • 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 Y17.4 sits

  1. 1ChapterChapter 20: External causes of morbidity and mortality (V01-Y98)
  2. 2Block Y10-Y34Event of undetermined intent
  3. 3Category Y17Poisoning by and exposure to carbon monoxide and other gases and vapours, undetermined intent
  4. 4Valid code Y17.4Poisoning by and exposure to carbon monoxide from unspecified sources

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 Y17.4 in the CIHI source

Frequently asked questions

What does ICD-10-CA code Y17.4 mean?

Y17.4 is the ICD-10-CA code for “Poisoning by and exposure to carbon monoxide from unspecified sources” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is Y17.4 in ICD-10-CA?

Y17.4 sits under Y17 Poisoning by and exposure to carbon monoxide and other gases and vapours, undetermined intent, within Y10-Y34 Event of undetermined intent, within Chapter 20: External causes of morbidity and mortality (V01-Y98).

What coding notes apply to Y17.4?

ICD-10-CA lists Excludes, Note, Use additional code notes for Y17.4, 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 Y17.4

Y17.0Poisoning by and exposure to carbon monoxide from combustion engine exhaustY17.1Poisoning by and exposure to carbon monoxide from utility gasY17.2Poisoning by and exposure to carbon monoxide from other domestic fuelsY17.3Poisoning by and exposure to carbon monoxide from other sourcesY17.8Poisoning by and exposure to other specified gases and vapoursY17.9Poisoning by and exposure to unspecified gases and vapours