Exposure to ignition of highly flammable material (X04) ICD-10-CM
The X04 code range covers exposure to ignition of highly flammable material with 4 ICD-10-CM diagnosis codes. 3 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Inclusion Terms
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.
- Exposure to ignition of gasoline
- Exposure to ignition of kerosene
- Exposure to ignition of petrol
Type 2 Excludes
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.
- exposure to ignition or melting of nightwear X05
- exposure to ignition or melting of other clothing and apparel X06
7th Character Note
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.
- The appropriate 7th character is to be added to code X04
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
- A - initial encounter
- D - subsequent encounter
- S - sequela
Codes in the X04 Range 4 codes · 3 billable
About the X04 Code Range
Highly flammable material catching fire is the exposure described here, within the broader group of exposures to smoke, fire and flames. Examples include gasoline or kerosene igniting along with clothing.
The subdivisions differ by encounter designation: X04.XXXA is an initial encounter, X04.XXXD is a subsequent encounter, and X04.XXXS is a sequela, or later effect.
Questions About This Page
How many billable codes are in the X04 range?
Of the 4 codes in this range, 3 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the X04 range classify?
The range classifies exposure to ignition of highly flammable material. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
