Allergic dermatitis of left eye, unspecified eyelid

This code signifies an inflammatory reaction of the skin surrounding the left eye, specifically an unspecified eyelid, caused by an allergic response. This condition typically presents with redness, itching, swelling, and possibly scaling or blistering due to contact with an allergen or systemic allergic reaction.

Apply this code when documentation specifies allergic dermatitis affecting the left eyelid, without further detail regarding the specific eyelid (e.g., upper or lower). This diagnosis is supported by physician notes detailing an allergic etiology for the eyelid inflammation, often following exposure to cosmetics, environmental irritants, or systemic allergens.

• Ensure the documentation clearly states "allergic dermatitis" and specifies the "left eye" and "unspecified eyelid."
• Do not use this code if the laterality is not specified or if a specific eyelid (upper/lower) is documented; more specific codes exist.
• Consider an additional code for the specific allergen (e.g., T49.3X5A for adverse effect of ophthalmic preparations) if identified and documented.