Pseudomembranous conjunctivitis, right eye

This code signifies an inflammatory condition of the conjunctiva, specifically affecting the right eye, characterized by the formation of a false membrane. This membrane is typically composed of fibrin, inflammatory cells, and necrotic epithelium, adhering to the conjunctival surface. It is a more severe form of conjunctivitis often associated with certain bacterial or viral infections.

Use this code when documentation explicitly states "pseudomembranous conjunctivitis" affecting the right eye. This diagnosis is typically made upon clinical examination, often involving careful eversion of the eyelids to visualize the membrane. Supporting documentation would include physician notes detailing the presence of a pseudomembrane on the right conjunctiva.

• Differentiate from "membranous conjunctivitis" (H10.21-) which involves a true membrane that bleeds when removed.
• Ensure laterality is clearly documented as right (1), left (2), or bilateral (3) to select the correct subcategory.
• Look for associated infectious agents (e.g., adenovirus, Corynebacterium diphtheriae) which may require additional codes.