W40Header code — not billable
Explosion of other materials
- Chapter
- 20. External causes of morbidity
- Category
- W40
- Effective date
- October 1, 2026
Related codes in category W40
W40.0Explosion of blasting materialW40.0XXAExplosion of blasting material, initial encounterYesW40.0XXDExplosion of blasting material, subsequent encounterYesW40.0XXSExplosion of blasting material, sequelaYesW40.1Explosion of explosive gasesW40.1XXAExplosion of explosive gases, initial encounterYesW40.1XXDExplosion of explosive gases, subsequent encounterYesW40.1XXSExplosion of explosive gases, sequelaYesW40.8Explosion of other specified explosive materialsW40.8XXAExplosion of oth explosive materials, init encntrYesW40.8XXDExplosion of oth explosive materials, subs encntrYesW40.8XXSExplosion of other specified explosive materials, sequelaYes
Frequently asked questions
What is ICD-10 code W40?
W40 is an ICD-10-CM diagnosis code for Explosion of other materials.
Is W40 a billable code?
No. W40 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 W40 in?
W40 falls under Chapter 20: External causes of morbidity.
When did W40 become effective?
W40 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to W40?
W40 belongs to category W40, which includes 12 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.