W40.9XXA
✓ Billable
Explosion of unspecified explosive materials, initial encounter
ICD-10-CM · FY2026 · External Causes of Morbidity
Code
W40.9XXA
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
External Causes of Morbidity
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code W40.9XXA?
ICD-10-CM code W40.9XXA represents Explosion of unspecified explosive materials, initial encounter. It is a billable diagnosis code in the External Causes of Morbidity chapter, effective October 1, 2025 – September 30, 2026.
Is W40.9XXA billable?
Yes. W40.9XXA is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is W40.9XXA in?
W40.9XXA belongs to the External Causes of Morbidity chapter (V00–Y99) of ICD-10-CM.
Related codes in the W40 category
W40
Explosion of other materials
Non-billable
W40.0
Explosion of blasting material
Non-billable
W40.1
Explosion of explosive gases
Non-billable
W40.8
Explosion of other specified explosive materials
Non-billable
W40.9
Explosion of unspecified explosive materials
Non-billable
W40.0XXA
Explosion of blasting material, initial encounter
Billable
W40.0XXD
Explosion of blasting material, subsequent encounter
Billable
W40.0XXS
Explosion of blasting material, sequela
Billable
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