W34.018S Accidental discharge of other gas, air or spring-operated gun, sequela

ICD-10-CM W34.018S: Accidental discharge of other gas, air or spring-operated gun, sequela

ICD-10-CM code W34.018S identifies a sequela following the accidental discharge of a gas, air, or spring-operated gun. The terminology record classifies this concept under the semantic type of Injury or Poisoning and designates it as an active code with a parent category of W34.018. 1 3

Plain-language overview

Code W34.018S represents complications or conditions that arise as a direct result of a prior accidental injury from a gas, air, or spring-operated gun discharge. 1 3

What this code represents

The official display label for W34.018S is Accidental discharge of other gas, air or spring-operated gun, sequela, and its semantic type is classified as Injury or Poisoning. 1 4

W34.018S is an active terminology concept that holds the parent code W34.018, which denotes the accidental discharge of other gas, air or spring-operated gun. 1

Coding details

A seventh character of S on an injury diagnosis code is utilized to identify sequelae, meaning complications or conditions that arise as a direct result of an injury. 3

The code W34.018S exists alongside alternative seventh characters for the same base category, including W34.018A for initial encounters and W34.018D for subsequent encounters. 5

Documentation considerations

The seventh character S on this diagnosis code identifies sequelae of an injury, distinguishing the encounter from active treatment for the initial injury or routine care during the healing phase. 3

Coverage and utilization context

Surveillance instructions for nonfatal firearm-related hospitalizations explicitly exclude gas, air, or spring-operated guns, meaning this specific injury mechanism is not captured in that particular indicator. 2

What the sources add

While the terminology record defines the code's hierarchical status and semantic type, the surveillance instructions provide operational context by explicitly excluding gas, air, or spring-operated guns from firearm-related injury indicators. 1 2

The seventh character S distinguishes sequelae from initial encounters, which receive active treatment, and subsequent encounters, which involve routine healing or recovery care. 3 5

Sources

1. ICD-10-CM W34.018S terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. State Injury Indicators: Instructions for Preparing 2022 Data — cdc.gov; accessed 2026-07-27.
3. National Health Statistics Reports — cdc.gov; accessed 2026-07-27.
4. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
5. ICD-10-CM 2024 | W34.0 - Accidental discharge from other and unspecified firearms and guns — unboundmedicine.com; accessed 2026-07-27.