MCMedicalCodingSoftware
W57.XXXD

W57.XXXD: Bitten or stung by nonvenomous insect and other nonvenomous arthropods, subsequent encounter

Billable / specific codeICD-10-CMPOA exempt

W57.XXXD is a billable, specific ICD-10-CM code for bitten or stung by nonvenomous insect and other nonvenomous arthropods, subsequent encounter. It is valid for submission on a claim.

Check W57.XXXD with the rest of the claim: free scrubber

7th character "D": subsequent encounter

The appropriate 7th character is to be added to code W57

A
initial encounter
D
subsequent encounter
S
sequela

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

Excludes1 inherited from the categories above W57.XXXD

A category’s note binds every code beneath it.

Written on W57: Bitten or stung by nonvenomous insect and other nonvenomous arthropods

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

W57.XXXD is named in 4 Medicare coverage policies: 4 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A58710Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing
  • A58720Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing
  • A58747Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing
  • A58761Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under W57

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.