X04: Exposure to ignition of highly flammable material

Codes under X04 (Exposure to ignition of highly flammable material). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
X04.XXXA	Exposure to ignition of highly flammable material, initial encounter	✓
X04.XXXD	Exposure to ignition of highly flammable material, subsequent encounter	✓
X04.XXXS	Exposure to ignition of highly flammable material, sequela	✓

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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