X30 ICD-10-CA code: Exposure to excessive natural heat
X30 is the ICD-10-CA code for “Exposure to excessive natural heat” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
X30Exposure to excessive natural heat
ICD-10-CA · Canada
Index terms
Entries in CIHI’s alphabetical index that lead to X30. Searching the index by the condition the note names is how coders reach this code.
- Overheated
- Ictus, caloris
- Ictus, solaris
- Exhaustion, heat
- Hot, place, effects
- Insolation, effects
- Hot, weather, effects
- High, temperature, effects
- Heat (effects of) (excessive)
- Exposure (to), heat (natural) NEC
- Effect(s) (adverse) of, hot, place
- Effect(s) (adverse) of, insolation
- Effect(s) (adverse) of, hot, weather
- Overexposure (accidental) (to), heat
- Effect(s) (adverse) of, heat (excessive)
- Exposure (to), excessive, heat (natural) NEC
- Accident (to), caused by, due to, heat (excessive)
- Heat (effects of) (excessive), due to, weather (conditions)
Notes for X30
As CIHI prints them, with any note X30 takes from the headings above it.
Includes
- Excessive heat as the cause of sunstrokeexposure to heat NOS
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.From X30-X39 Exposure to forces of nature
Excludes
Conditions classified elsewhere.
- Excessive heat of man-made origin (W92.-)
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 X30 sits
- 1ChapterChapter 20: External causes of morbidity and mortality (V01-Y98)
- 2Block V01-X59Accidents
- 3Block W00-X59Other external causes of accidental injury
- 4Block X30-X39Exposure to forces of nature
- 5Valid code X30Exposure to excessive natural heat
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.
Frequently asked questions
What does ICD-10-CA code X30 mean?
X30 is the ICD-10-CA code for “Exposure to excessive natural heat” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is X30 in ICD-10-CA?
X30 sits under X30-X39 Exposure to forces of nature, 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 X30?
ICD-10-CA lists Includes, Excludes, Use additional code, Note notes for X30, 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.