ICD-10-CM 2027 diagnosis code

W53Contact with rodent

Not billable — use a more specific code

W53 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About W53

W53 is the ICD-10-CM diagnosis code for contact with rodent. It belongs to block W50-W64 (exposure to animate mechanical forces) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: W53.0 (mouse), W53.1 (rat), W53.2 (squirrel) and W53.8 (rodent).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under W53

Coding notes

IncludesFurther defines the content of the category

contact with saliva, feces or urine of rodent

Notes that apply from higher levels

Instructions written at a parent level also apply to W53.

Broader instructions also apply from W50-W64 Exposure to animate mechanical forces and Chapter 20: External causes of morbidity.

Codes whose notes reference W53

W55Excludes1

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about W53

Is W53 billable?: No. W53 is a header code. Report one of its more specific subcodes instead.