X00
Exposure to uncontrolled fire in building or structure
X00 is a non-billable ICD-10-CM code category for exposure to uncontrolled fire in building or structure. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are X00.0 Exposure to flames in uncontrolled fire in building or structure, X00.1 Exposure to smoke in uncontrolled fire in building or structure, X00.2 Injury due to collapse of burning building or structure in uncontrolled fire, X00.3 Fall from burning building or structure in uncontrolled fire and 3 more. Its coding notes include a Code first instruction, 1 Excludes1 entry and 6 Excludes2 entries.
7th characters
Every code below needs one of these.
The appropriate 7th character is to be added to each code from category X00
- Ainitial encounter
- Dsubsequent encounter
- Ssequela
Guidelines tip
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
An external cause code is never a principal or first-listed diagnosis. Its 7th character is assigned for each encounter and should match the injury or condition code.
Code first
If the underlying condition listed here is present and known, sequence it first.
- any associated cataclysm
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Includes
Further defines or gives examples of the content of the category.
- conflagration in building or structure
Notes
Also from chapter/block level (1 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.
More specific codes under X00 7
- X00.0Exposure to flames in uncontrolled fire in building or structure7th char needed
- X00.1Exposure to smoke in uncontrolled fire in building or structure7th char needed
- X00.2Injury due to collapse of burning building or structure in uncontrolled fire7th char needed
- X00.3Fall from burning building or structure in uncontrolled fire7th char needed
- X00.4Hit by object from burning building or structure in uncontrolled fire7th char needed
- X00.5Jump from burning building or structure in uncontrolled fire7th char needed
- X00.8Other exposure to uncontrolled fire in building or structure7th char needed