Angular blepharoconjunctivitis, bilateral

This code signifies an inflammatory condition affecting both the outer corner of the eyelids (canthus) and the conjunctiva, the membrane lining the eyelids and covering the white part of the eye. It typically presents with redness, irritation, and discharge concentrated at the lateral canthus of both eyes.

Apply this code when documentation explicitly states "angular blepharoconjunctivitis" affecting both eyes. This diagnosis is often associated with bacterial infections, particularly Moraxella lacunata, or chronic irritation. Supporting documentation should include findings of inflammation, erythema, and discharge at the lateral canthi of both eyes.

• Ensure the documentation specifies "bilateral" involvement; otherwise, a unilateral code (H10.521 or H10.522) would be more appropriate.
• Do not confuse with other forms of blepharoconjunctivitis that are not specifically angular or do not involve both eyes.
• Look for associated bacterial cultures if performed, but the diagnosis itself does not require pathogen identification for this code.