W57
⚠ Non-billable
Bitten or stung by nonvenomous insect and other nonvenomous arthropods
ICD-10-CM · FY2026 · External Causes of Morbidity
Code
W57
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
External Causes of Morbidity
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code W57?
ICD-10-CM code W57 represents Bitten or stung by nonvenomous insect and other nonvenomous arthropods. It is a non-billable header code requiring a more specific subcategory in the External Causes of Morbidity chapter, effective October 1, 2025 – September 30, 2026.
Is W57 billable?
No. W57 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is W57 in?
W57 belongs to the External Causes of Morbidity chapter (V00–Y99) of ICD-10-CM.
Related codes in the W57 category
W57.XXXA
Bitten or stung by nonvenomous insect and other nonvenomous arthropods, initial encounter
Billable
W57.XXXD
Bitten or stung by nonvenomous insect and other nonvenomous arthropods, subsequent encounter
Billable
W57.XXXS
Bitten or stung by nonvenomous insect and other nonvenomous arthropods, sequela
Billable
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