2018/2019 ICD-10-CM Diagnosis Code W34.00XA. Accidental discharge from unspecified firearms or gun, initial encounter. W34.00XA is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Airgun shootings are not distinguished under either ICD-9 or ICD-10. “Accidental” airgun shooting moves from the residual category of “Striking against or struck accidentally by object or person – other” under ICD-9 to the residual categories for “Discharge from other and unspecified firearms” under ICD-10.
“Accidental” injury due to an air rifle or BB gun is coded to E917.9 (Striking against or struck accidentally by object or person-other) “Military firearm” and “hunting rifle” are not further defined. Table 2: Coding of firearms in ICD-10 Firearm coding categories chosen for use should be useable in hospital settings.
Forthcoming changes in coding (i.e., the introduction of ICD-10) will reduce the already limited information on the type of firearm involved in shooting injuries. Only handguns will be distinguished with any useful degree of specificity, and these account for a small proportion of cases in Australia.
E922.9 is a legacy non-billable code used to specify a medical diagnosis of accident caused by unspecified firearm missile. This code was replaced on September 30, 2015 by its ICD-10 equivalent.
The following crosswalk between ICD-9 to ICD-10 is based based on the General Equivalence Mappings (GEMS) information:
General Equivalence Map Definitions The ICD-9 and ICD-10 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
As of October 2015, ICD-9 codes are no longer used for medical coding. Instead, use this equivalent ICD-10-CM code, which is an approximate match to ICD-9 code E922.9:
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
Alter the coding rule for accidental injury due to an air rifle: use E922.7, not E917.9 (part).
The introduction of ICD-10 will reduce the already limited information on the type of firearm involved in shooting injuries. Only handguns will be distinguished with any useful degree of specificity. Handguns account for a small minority of shooting cases in Australia (about 5 percent or less of shooting deaths and less than 20 percent of cases admitted to a hospital.)
Further information will be sought on the extent of information on firearm type that is recorded in medical records. The findings will guide further steps. These may include efforts to improve the information about firearms that is recorded, revision of the classification to accommodate practicalities of clinical practice, and further development of the classification to specify firearms in terms of the Australian firearm license categories (for example, to distinguish self-loading and pump-action long-guns from other types)
Shooting deaths are generally investigated by police and assessed and certified by a coroner. About four-fifths are recorded as suicides and another 5 percent are found to be accidental. One might expect that the firearm would be readily available for assessment in these cases. Surprisingly, about 30 percent of firearm suicides and about 40 percent of accidental firearm deaths between 1979 and 1995 were given the E-code meaning “Firearm – other or unspecified.”
Plans are in place to introduce ICD-10 in Australia in the near future. The date of introduction for coding hospital separations is 1 July 1998. Hospital separations coding will initially use the first Australian Modification of ICD-10, to be published soon by the National Center for Classification in Health. (The sections of interest here are the same as in the standard edition of ICD-10.)
Two of the categories provided under ICD-9-CM are poorly defined and pose difficulties for coding and for interpretation.
“Accidental” airgun shooting moves from the residual category of “Striking against or struck accidentally by object or person – other” under ICD-9 to the residual categories for “Discharge from other and unspecified firearms” under ICD-10. There is no defined place for coding injury due to gas ( not air) or spring power ed guns in either edition of ICD.
The 2022 edition of ICD-10-CM W34.00XA became effective on October 1, 2021.
W34.00XA describes the circumstance causing an injury, not the nature of the injury.