Contact with rodent
In Exposure to animate mechanical forces (W50-W64), chapter 20: External Causes of Morbidity
24 billable codes under W53: none are a CC or MCC; none map to an HCC.
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Instructional notes
Includes: conditions that are coded here
- contact with saliva, feces or urine of rodent
Also applies, from Exposure to animate mechanical forces (W50-W64)
These notes sit on W50-W64 and apply to every code under it, including W53.
Excludes1: not coded here, use a different code
- Toxic effect of contact with venomous animals and plants (T63.-)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers how to report external cause codes (V00-Y99) describing cause, intent, place, activity, and status. They are never principal or first-listed, and reporting is voluntary unless required.
- General External Cause Coding Guidelines (page 88)
- Place of Occurrence Guideline (page 89)
- Activity Code (page 89)
- Place of Occurrence, Activity, and Status Codes Used with other External Cause Code (page 89)
- If the Reporting Format Limits the Number of External Cause Codes (page 90)
- Multiple External Cause Coding Guidelines (page 90)
- Child and Adult Abuse Guideline (page 90)
- Unknown or Undetermined Intent Guideline (page 91)
All codes under W53
W53 can't be used on a claim. Pick a billable code below; grey headings group them.
- W53.0Contact with mouse
- W53.01Bitten by mouse
- W53.01XABitten by mouse, initial encounter
- W53.01XDBitten by mouse, subsequent encounter
- W53.01XSBitten by mouse, sequela
- W53.09Other contact with mouse
- W53.09XAOther contact with mouse, initial encounter
- W53.09XDOther contact with mouse, subsequent encounter
- W53.09XSOther contact with mouse, sequela
- W53.1Contact with rat
- W53.11Bitten by rat
- W53.11XABitten by rat, initial encounter
- W53.11XDBitten by rat, subsequent encounter
- W53.11XSBitten by rat, sequela
- W53.19Other contact with rat
- W53.19XAOther contact with rat, initial encounter
- W53.19XDOther contact with rat, subsequent encounter
- W53.19XSOther contact with rat, sequela
- W53.2Contact with squirrel
- W53.21Bitten by squirrel
- W53.21XABitten by squirrel, initial encounter
- W53.21XDBitten by squirrel, subsequent encounter
- W53.21XSBitten by squirrel, sequela
- W53.29Other contact with squirrel
- W53.29XAOther contact with squirrel, initial encounter
- W53.29XDOther contact with squirrel, subsequent encounter
- W53.29XSOther contact with squirrel, sequela
- W53.8Contact with other rodent
- W53.81Bitten by other rodent
- W53.81XABitten by other rodent, initial encounter
- W53.81XDBitten by other rodent, subsequent encounter
- W53.81XSBitten by other rodent, sequela
- W53.89Other contact with other rodent
- W53.89XAOther contact with other rodent, initial encounter
- W53.89XDOther contact with other rodent, subsequent encounter
- W53.89XSOther contact with other rodent, sequela
W53 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
Other codes that refer to W53
Notes on these codes point to W53.
- W55 Excludes1: bitten or struck by rodent (W53.-)
Code history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.
