Insect bite (nonvenomous) of left wrist, initial encounter

This code signifies a non-venomous insect bite affecting the left wrist. It indicates the initial presentation and treatment of the injury. The bite may present with localized redness, swelling, itching, or minor irritation without systemic effects from venom.

Use this code when a patient presents for the first time with symptoms directly attributable to a non-venomous insect bite on their left wrist. This includes common bites from mosquitoes, fleas, or gnats. It is appropriate for the initial evaluation and management of such an injury.

• Always confirm the laterality (left wrist) and the non-venomous nature of the bite.
• Ensure this is the patient's first encounter for this specific injury; subsequent encounters would use a different seventh character.
• Consider an external cause code (e.g., W57.XXXA) to describe the insect responsible for the bite, if known.