2025 ICD-10-CM code W53.11

Bitten by rat.

This code should be used as a secondary code to a code from another chapter indicating the nature of the injury, such as a code from Chapter 19 (Injury, poisoning and certain other consequences of external causes).

Use additional 7th character to specify the encounter: A (initial encounter), D (subsequent encounter), or S (sequela).

Medical necessity for the treatment of a rat bite is based on the potential for infection and the risk of rabies transmission. Treatment is necessary to prevent complications and ensure appropriate wound care.

The provider is responsible for documenting the location and severity of the bite, any associated injuries, and treatment provided, including rabies prophylaxis if necessary.

In simple words: The code represents a diagnosis of being bitten by a rat.

Bitten by rat.Contact with saliva, feces or urine of rodent.

Example 1: A patient presents to the emergency department after being bitten by a rat while cleaning out an old shed. The bite is on the patient's hand and is bleeding. The provider cleans and bandages the wound and prescribes antibiotics., A homeless individual comes to a clinic complaining of a rat bite on their foot. The bite is infected. The provider debrides the wound, prescribes antibiotics, and updates the patient's tetanus immunization., A child is playing in a park and is bitten by a rat. The parents bring the child to the pediatrician. The bite is superficial and does not require antibiotics, but the pediatrician discusses rabies prevention with the parents.

Documentation should include the location and severity of the bite, any associated injuries (such as lacerations, punctures, or infections), and the treatment provided. If rabies prophylaxis is administered, this should also be documented.

** Excludes1: Toxic effect of contact with venomous animals and plants (T63.-)

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