ICD-10 X04
Non-Billable HeaderExposure to ignition of highly flammable material
About ICD-10-CM X04
ICD-10-CM code X04 represents Exposure to ignition of highly flammable material. This is a non-billable header code in the External Causes of Morbidity chapter (block X04). The 2026 edition of ICD-10-CM X04 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under X04. Per CMS ICD-10-CM Tabular 2026.
- Exposure to ignition of gasoline
- Exposure to ignition of kerosene
- Exposure to ignition of petrol
Type 2 Excludes
Not included here, the excluded code is not part of X04, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- exposure to ignition or melting of nightwear (X05)
- exposure to ignition or melting of other clothing and apparel (X06)
Coding Notes
Seven Chr Note
- The appropriate 7th character is to be added to code X04
Medicare LCD Coverage for X04
Local Coverage Determinations (LCDs) from CMS MACs that list X04 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing X04.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but X04 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with X04
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To X04
Other codes in section X00-X08 (Exposure to smoke, fire and flames).
ICD-10 X04, Billing FAQ
Is ICD-10 code X04 billable? +
No, X04 is a non-billable header code. Use a more specific child code from block X04 when submitting claims.
What other names or terms map to X04? +
ICD-10 X04 includes: Exposure to ignition of gasoline; Exposure to ignition of kerosene; Exposure to ignition of petrol.
What codes are Type 2 Excludes for X04? +
Type 2 Excludes (may be coded together when both conditions exist): exposure to ignition or melting of nightwear (X05); exposure to ignition or melting of other clothing and apparel (X06)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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