X04Header code — not billable
Exposure to ignition of highly flammable material
- Chapter
- 20. External causes of morbidity
- Category
- X04
- Effective date
- October 1, 2026
Related codes in category X04
Frequently asked questions
What is ICD-10 code X04?
X04 is an ICD-10-CM diagnosis code for Exposure to ignition of highly flammable material.
Is X04 a billable code?
No. X04 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is X04 in?
X04 falls under Chapter 20: External causes of morbidity.
When did X04 become effective?
X04 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to X04?
X04 belongs to category X04, which includes 3 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.