2026 ICD-10-CM Diagnosis Code X04Exposure to ignition of highly flammable material
X04 is a non-billable ICD-10-CM category code for exposure to ignition of highly flammable material, so it cannot be submitted on claims. Use a more specific code from this category instead, such as X04.XXXA, X04.XXXD, and X04.XXXS.
Code Identity
Code Classification
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Exposure to ignition of gasoline
- Exposure to ignition of kerosene
- Exposure to ignition of petrol
Type 2 Excludes
- exposure to ignition or melting of nightwear X05
- exposure to ignition or melting of other clothing and apparel X06
7th Character Note
- The appropriate 7th character is to be added to code X04
7th Character
- A - initial encounter
- D - subsequent encounter
- S - sequela
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
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 X04Overview
Is X04 (Exposure to ignition of highly flammable material) a billable code?
No. This is a category header that groups the codes for exposure to ignition of highly flammable material, and headers cannot be submitted on claims. Claims for exposure to ignition of highly flammable material need a more specific code from this category, such as X04.XXXA, X04.XXXD, and X04.XXXS.
