W40: Explosion of other materials

Codes under W40 (Explosion of other materials). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
W40.0	Explosion of blasting material	—
W40.0XXA	Explosion of blasting material, initial encounter	✓
W40.0XXD	Explosion of blasting material, subsequent encounter	✓
W40.0XXS	Explosion of blasting material, sequela	✓
W40.1	Explosion of explosive gases	—
W40.1XXA	Explosion of explosive gases, initial encounter	✓
W40.1XXD	Explosion of explosive gases, subsequent encounter	✓
W40.1XXS	Explosion of explosive gases, sequela	✓
W40.8	Explosion of other specified explosive materials	—
W40.8XXA	Explosion of other specified explosive materials, initial encounter	✓
W40.8XXD	Explosion of other specified explosive materials, subsequent encounter	✓
W40.8XXS	Explosion of other specified explosive materials, sequela	✓
W40.9	Explosion of unspecified explosive materials	—
W40.9XXA	Explosion of unspecified explosive materials, initial encounter	✓
W40.9XXD	Explosion of unspecified explosive materials, subsequent encounter	✓
W40.9XXS	Explosion of unspecified explosive materials, 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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