Insect bite (nonvenomous) of breast, left breast, init

This code identifies a non-venomous insect bite affecting the left breast. It signifies an injury to the skin and subcutaneous tissue of the left breast caused by an insect, without the introduction of venom.

Apply this code when a patient presents with a documented insect bite on their left breast, and the bite is explicitly stated as non-venomous. This is appropriate for the initial assessment and treatment of such an injury.

• Ensure the documentation specifies "left breast" and "nonvenomous" to support this code.
• Verify the encounter is the initial one for this specific injury; subsequent encounters would use a different seventh character.
• Consider an external cause code (e.g., W57.XXXA) to further describe the circumstances of the bite.