Discharge of firework (W39)
W39 codes capture injuries related to the discharge of fireworks. These codes are used to document accidents involving fireworks, such as burns or other harm caused by their explosion or misfire.
The ICD-10 code for discharge of firework, W39, and its variations specify the type of encounter: initial encounter (W39.XXXA) for the first treatment after injury, subsequent encounter (W39.XXXD) for follow-up care, and sequela (W39.XXXS) for complications or conditions that arise as a direct result of the firework accident. Commonly referenced as "accident caused by fireworks" or "firework burn of skin," these terms help medical coders accurately assign the appropriate code when fireworks cause injury. Using these codes ensures that records precisely reflect injuries from firework incidents and the stage of care being provided, which is essential for clinical, legal, and billing purposes. This ICD-10 code for firework injuries specifically distinguishes these causes from other types of burns or trauma.
External causes of morbidity and mortality (V01–Y99)
Exposure to inanimate mechanical forces (W20-W49)
W39 Discharge of firework
- W39.XXXA Discharge of firework, initial encounter
- W39.XXXD Discharge of firework, subsequent encounter
- W39.XXXS Discharge of firework, sequela
Discharge of firework (W39)
Instructional Notations
7th Character Note
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
- The appropriate 7th character is to be added to code W39
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
- A - initial encounter
- D - subsequent encounter
- S - sequela
