2026 ICD-10-CM Diagnosis Code X00Exposure to uncontrolled fire in building or structure
X00 is a non-billable ICD-10-CM category code for exposure to uncontrolled fire in building or structure, so it cannot be submitted on claims. Use a more specific code from this category instead, such as X00.0XXA, X00.0XXD, X00.0XXS, and X00.1XXA.
Code Identity
Code Classification
Specific Coding for Exposure to uncontrolled fire in building or structureOverview
Non-specific codes like X00 require more characters. Use one of these billable codes instead:
X00.0 for Exposure to flames in uncontrolled fire in building or structure
X00.1 for Exposure to smoke in uncontrolled fire in building or structure
X00.2 for Injury due to collapse of burning building or structure in uncontrolled fire
X00.3 for Fall from burning building or structure in uncontrolled fire
X00.4 for Hit by object from burning building or structure in uncontrolled fire
X00.5 for Jump from burning building or structure in uncontrolled fire
X00.8 for Other exposure to uncontrolled fire in building or structure
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Includes
- conflagration in building or structure
Code First
- any associated cataclysm
Type 2 Excludes
- Exposure to ignition or melting of nightwear X05
- Exposure to ignition or melting of other clothing and apparel X06
- Exposure to other specified smoke, fire and flames X08
7th Character Note
- The appropriate 7th character is to be added to each code from category X00
7th Character
- A - initial encounter
- D - subsequent encounter
- S - sequela
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
Indicates that a seventh character is to be assigned to codes in a subcategory.
Code HistoryHistory
Questions About X00Overview
Is X00 (Exposure to uncontrolled fire in building or structure) a billable code?
No. This is a category header that groups the codes for exposure to uncontrolled fire in building or structure, and headers cannot be submitted on claims. Claims for exposure to uncontrolled fire in building or structure need a more specific code from this category, such as X00.0XXA, X00.0XXD, and X00.0XXS.
