2023 ICD-10-CM Diagnosis Code W40.9

Explosion of unspecified explosive materials

    2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
  • W40.9 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2023 edition of ICD-10-CM W40.9 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of W40.9 - other international versions of ICD-10 W40.9 may differ.
ICD-10-CM Coding Rules
  • W40.9 describes the circumstance causing an injury, not the nature of the injury.
Applicable To
  • Explosion NOS
The following code(s) above W40.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to W40.9:
  • V00-Y99
    2023 ICD-10-CM Range V00-Y99

    External causes of morbidity

    • 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.
    External causes of morbidity
  • W20-W49
    2023 ICD-10-CM Range W20-W49

    Exposure to inanimate mechanical forces

    Type 1 Excludes
    • assault (X92-Y09)
    • contact or collision with animals or persons (W50-W64)
    • exposure to inanimate mechanical forces involving military or war operations (Y36.-, Y37.-)
    • intentional self-harm (X71-X83)
    Exposure to inanimate mechanical forces
  • W40
    ICD-10-CM Diagnosis Code W40

    Explosion of other materials

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • assault by explosive material (X96)
    • explosion involving legal intervention (Y35.1-)
    • explosion involving military or war operations (Y36.0-, Y36.2-)
    • intentional self-harm by explosive material (X75)
    Explosion of other materials
Clinical Information
  • Injuries resulting when a person is struck by particles impelled with violent force from an explosion. Blast causes pulmonary concussion and hemorrhage, laceration of other thoracic and abdominal viscera, ruptured ear drums, and minor effects in the central nervous system. (from Dorland, 27th ed)
  • The result of physical trauma sustained in an explosion.
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change

External Cause Index entries containing back-references to W40.9:

ICD-10-CM Codes Adjacent To W40.9
W40.0XXD …… subsequent encounter
W40.0XXS …… sequela
W40.1 Explosion of explosive gases
W40.1XXA …… initial encounter
W40.1XXD …… subsequent encounter
W40.1XXS …… sequela
W40.8 Explosion of other specified explosive materials
W40.8XXA …… initial encounter
W40.8XXD …… subsequent encounter
W40.8XXS …… sequela
W40.9 Explosion of unspecified explosive materials
W40.9XXA …… initial encounter
W40.9XXD …… subsequent encounter
W40.9XXS …… sequela
W42 Exposure to noise
W42.0 Exposure to supersonic waves
W42.0XXA …… initial encounter
W42.0XXD …… subsequent encounter
W42.0XXS …… sequela
W42.9 Exposure to other noise
W42.9XXA …… initial encounter

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.