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  5. Bitten or stung by nonvenomous insect and other nonvenomous arthropods (W57)

Bitten or stung by nonvenomous insect and other nonvenomous arthropods (W57)

The ICD-10 code W57 is designated for injuries caused by bites or stings from nonvenomous insects and other nonvenomous arthropods. This classification helps specify the nature and timing of the encounter, whether initial, subsequent, or related to sequela (long-term effects).

Code W57 covers a wide range of nonvenomous insect and arthropod bites or stings, including common terms such as "nonvenomous insect bite," "sting by bumble bee," "bite by fire ant," and "insect bite reaction." Medical coders will find versions like W57.XXXA for the initial encounter, W57.XXXD for subsequent encounters, and W57.XXXS for sequela of such bites or stings. These codes include injuries from bites or stings on various body parts (e.g., face, arm, leg, foot) with or without infection, as well as allergic or infected reactions. Using these specific ICD-10 codes assists healthcare professionals in accurately documenting nonvenomous insect or arthropod-related injuries and their treatment stages.

Instructional Notations

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

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 W57

7th Character

Indicates that a seventh character is to be assigned to codes in a subcategory.

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela