2024 ICD-10-CM Diagnosis Code W40.8XXA

Explosion of other specified explosive materials, initial encounter

ICD-10-CM Code:
W40.8XXA
ICD-10 Code for:
Explosion of oth explosive materials, init encntr
Is Billable?
Yes - Valid for Submission
Code Navigator:

Code Classification

  • External causes of morbidity and mortality
    (V01–Y99)
    • Exposure to inanimate mechanical forces
      (W20-W49)
      • Explosion of other materials
        (W40)

W40.8XXA is a billable diagnosis code used to specify a medical diagnosis of explosion of other specified explosive materials, initial encounter. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024. The code is exempt from present on admission (POA) reporting for inpatient admissions to general acute care hospitals.

W40.8XXA is an initial encounter code, includes a 7th character and should be used while the patient is receiving active treatment for a condition like explosion of other specified explosive materials. According to ICD-10-CM Guidelines an "initial encounter" doesn't necessarily means "initial visit". The 7th character should be used when the patient is undergoing active treatment regardless if new or different providers saw the patient over the course of a treatment. The appropriate 7th character codes should also be used even if the patient delayed seeking treatment for a condition.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Accident caused by aerial bomb
  • Accident caused by explosion of bomb
  • Accident caused by explosion of bomb
  • Accident caused by explosion of grenade
  • Accident caused by explosion of munitions dump
  • Accident caused by explosion of munitions factory
  • Accident caused by explosion of shell
  • Accident caused by explosion of torpedo
  • Accident caused by explosive device
  • Accident caused by explosive device
  • Accident caused by explosive device
  • Accident caused by explosive device
  • Accident caused by explosive device
  • Accident caused by explosive device
  • Accident caused by explosive device
  • Accident caused by explosive device
  • Accident caused by explosive missile
  • Accident caused by terrorist bomb
  • Exposure to heat flash
  • Exposure to heat flash due to explosion in industry
  • Exposure to heat flash in explosion
  • Exposure to heat flash in explosion due to liquid fuel
  • Injury due to accidental explosion of munitions
  • Injury due to explosion of breech block
  • Injury due to explosion of depth charge
  • Injury due to explosion of marine mine
  • Injury due to explosion of marine weapon
  • Injury due to explosion of mortar bomb
  • Injury due to explosion of sea-based artillery shell
  • Injury due to explosion of torpedo
  • Injury due to explosive blast from artillery shell
  • Injury due to explosive blast from weapon
  • Injury due to fragment from aerial bomb
  • Injury due to fragment from antipersonnel bomb
  • Injury due to fragment from artillery shell
  • Injury due to fragment from hand grenade
  • Injury due to fragment from improvised bomb
  • Injury due to fragment from land mine
  • Injury due to fragment from mortar bomb
  • Injury due to fragment from self-propelled missile
  • Injury due to fragment of explosive weapon
  • Injury due to legal intervention by explosive
  • Injury due to legal intervention by explosive
  • Injury due to legal intervention by explosive
  • Injury due to legal intervention by explosive shell
  • Injury due to legal intervention by grenade
  • Injury due to legal intervention by mortar bomb
  • Injury due to nuclear explosion
  • War injuries due to bullets and fragments
  • War injuries due to explosion of marine weapons
  • War injury due to accidental explosion of munitions being used in war
  • War injury due to accidental explosion of own weapons
  • War injury due to explosion of artillery shell
  • War injury due to explosion of breech block
  • War injury due to explosion of cannon block
  • War injury due to explosion of depth charge explosion
  • War injury due to explosion of marine mine
  • War injury due to explosion of mortar bomb
  • War injury due to explosion of sea-based artillery shell
  • War injury due to explosion of torpedo
  • War injury due to fragments from antipersonnel bomb
  • War injury due to fragments from artillery shell
  • War injury due to fragments from grenade
  • War injury due to fragments from guided missile
  • War injury due to fragments from land mine
  • War injury due to fragments from rocket
  • War injury due to fragments from shell
  • War injury due to fragments from shrapnel

Clinical Classification

Clinical CategoryCCSR Category CodeInpatient Default CCSROutpatient Default CCSR
External cause codes: intent of injury, accidental/unintentionalEXT020X - Not applicable.X - Not applicable.
External cause codes: other specified, classifiable and NEC; initial encounterEXT018X - Not applicable.X - Not applicable.

Present on Admission (POA)

W40.8XXA is exempt from POA reporting - The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement. Review other POA exempt codes here.

CMS POA Indicator Options and Definitions

POA IndicatorReason for CodeCMS will pay the CC/MCC DRG?
YDiagnosis was present at time of inpatient admission.YES
NDiagnosis was not present at time of inpatient admission.NO
UDocumentation insufficient to determine if the condition was present at the time of inpatient admission.NO
WClinically undetermined - unable to clinically determine whether the condition was present at the time of inpatient admission.YES
1Unreported/Not used - Exempt from POA reporting. NO

Convert W40.8XXA to ICD-9-CM

  • ICD-9-CM Code: E923.8 - Explosives accident NEC
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.