Insect bite (nonvenomous), unspecified lower leg, sequela

This code signifies a lasting health problem or condition that resulted from a nonvenomous insect bite on an unspecified part of the lower leg. It indicates that the acute phase of the bite has passed, and the patient is now experiencing a chronic or residual effect. This could include persistent scarring, chronic dermatitis, or other long-term complications directly attributable to the original bite.

Apply this code when documenting a patient presenting with a sequela (e.g., chronic itching, hyperpigmentation, scar tissue) that is definitively linked to a past nonvenomous insect bite on the lower leg. This is appropriate for follow-up visits where the primary concern is the long-term consequence, not the acute injury itself. Ensure the medical record clearly establishes the causal link between the bite and the current condition.

• Always use this code as a secondary diagnosis, following the code for the specific sequela (e.g., L90.5 for scar conditions).
• Confirm the bite was nonvenomous; if venomous, a different code category would apply.
• The "S" seventh character indicates sequela and must always be used for this code.