Contact blepharoconjunctivitis, left eye

This code signifies inflammation of both the eyelid margins and the conjunctiva of the left eye, specifically caused by direct contact with an irritant or allergen. It presents with symptoms such as redness, itching, swelling, and discharge affecting the left ocular surface and adnexa.

Apply this code when documentation clearly indicates blepharoconjunctivitis in the left eye resulting from an external contact agent. This includes reactions to cosmetics, environmental irritants, or topical ophthalmic medications. Ensure the physician's notes specify the laterality and the contact etiology.

• Differentiate from allergic blepharoconjunctivitis (H10.4-) if the specific contact irritant is unknown or not explicitly documented as the cause.
• Confirm laterality; this code is specific to the left eye. Use H10.531 for the right eye or H10.533 for bilateral involvement.
• Consider an additional external cause code (V00-Y99) if the specific contact agent is identified and clinically relevant.