2025 ICD-10-CM code W53.09XS
(Active) Effective Date: N/A External causes of morbidity - Exposure to animate mechanical forces 20 Feed
Sequela of other contact with mouse. This code describes the late effects of contact with a mouse, such as from exposure to its saliva, feces, or urine, not a bite.
Medical necessity for the use of this code must be supported by documentation that clearly links the reported sequela to the previous exposure to a mouse.The documentation must also demonstrate the need for medical intervention to address the sequela.
The provider is responsible for documenting the specific late effect(s) caused by the previous contact with the mouse.The documentation should also support the causal link between the contact and the current condition.Additional codes should be used as needed to identify the specific nature of the sequelae.
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- Accidents (V00-X58)Other external causes of accidental injury (W00-X58)Exposure to animate mechanical forces (W50-W64)
In simple words: This code indicates long-term health problems that developed after contact with a mouse (but not from a mouse bite).
Sequela of other contact with mouse.Contact with saliva, feces or urine of rodent. This code is used to report the late effects (sequelae) resulting from contact with a mouse, excluding bites. Sequelae are the residual effects or complications that persist after the acute phase of an illness or injury has resolved. This code captures conditions that arise as a direct result of previous contact with a mouse.
Example 1: A patient presents with persistent respiratory issues, identified as allergies, stemming from previous exposure to mouse droppings in their home., A patient experiences long-term skin irritation and itching, later diagnosed as a reaction to contact with mouse urine., A patient develops a chronic infection which is determined to have resulted from an open wound exposed to mouse feces.
Documentation must clearly establish a cause-and-effect relationship between the past contact with a mouse (excluding bites) and the current condition. Details of the original incident, the timeline of the development of the sequelae, and all supporting clinical findings should be included in the medical record.
** For accurate coding, it is crucial to differentiate between contact with a mouse (W53.09XS) and a bite from a mouse, which would be coded differently. Additionally, always report the sequela (the late effect) as the primary diagnosis, followed by W53.09XS as a secondary code.
- Specialties:Infectious disease, Allergy and Immunology, Dermatology, Family Medicine, Internal Medicine, Pediatrics
- Place of Service:Office, Inpatient Hospital, Outpatient Hospital, Home, Other Place of Service