W40.1
Explosion of explosive gases
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 4 never code together
W40code
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
7th character 3
A initial encounter
D subsequent encounter
S sequela
Instructional notes 10
W40.1code
Inclusion terms
- Explosion of acetylene
- Explosion of butane
- Explosion of coal gas
- Explosion in mine NOS
- Explosion of explosive gas
- Explosion of fire damp
- Explosion of gasoline fumes
- Explosion of methane
- Explosion of propane
V00-Y99chapter
Notes
- This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.S00-T88
Index entries leading here 2
- Explosion (accidental) (of) (with secondary fire) W40.9
- acetylene W40.1
- anesthetic gas in operating room W40.1
- butane W40.1
- coal gas W40.1
- gas (coal) (explosive) W40.1
- gasoline (fumes) (tank) not in moving motor vehicle W40.1
- in, on
- mine (of explosive gases) NEC W40.1
- methane W40.1
- mine W40.1
- propane W40.1
- fire-damp W40.1
- explosive (material) W40.9
- gas W40.1
- Ignition (accidental) X08.8
Alongside this code 3 same parent — W40
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.