Bit/stung by nonvenom insect & oth nonvenom arthropods, subs

This code signifies a follow-up visit for a patient who has sustained a bite or sting from an insect or arthropod that is not venomous. It indicates that the initial injury has already been addressed, and the patient is presenting for further evaluation, treatment, or monitoring related to the original incident.

Apply this code when a patient returns for a subsequent appointment concerning a nonvenomous insect bite or sting. This could include visits for wound care, management of secondary infection, persistent itching or rash, or follow-up on an allergic reaction that was not life-threatening.

• Ensure the encounter is explicitly documented as a follow-up or subsequent visit for the original bite/sting.
• Always code the specific type of nonvenomous insect or arthropod if known and documented (e.g., mosquito, ant) using a more specific code from the W57 category if available for the initial encounter.
• Remember to also code any associated conditions, such as cellulitis (L03.11X) or allergic dermatitis (L23.7), as secondary diagnoses.