Contact blepharoconjunctivitis, bilateral

This code describes inflammation of both the eyelids and the conjunctiva on both eyes, specifically caused by contact with an irritant or allergen. It signifies a bilateral inflammatory response affecting these ocular structures due to external exposure.

Use this code when documentation clearly indicates bilateral blepharoconjunctivitis resulting from contact with a substance, such as cosmetics, chemicals, or environmental allergens. The physician's notes should specify the bilateral involvement and the contact etiology.

• Ensure documentation specifies "bilateral" involvement; otherwise, use a unilateral code (H10.51- or H10.52-).
• Distinguish from allergic blepharoconjunctivitis (H10.4-) if the etiology is purely allergic without direct contact as the primary cause.
• Code any associated external cause (e.g., T49.3X5A for adverse effect of ophthalmic preparations) if known and documented.