Ligneous conjunctivitis, unspecified eye

This code describes ligneous conjunctivitis, a rare, chronic form of pseudomembranous conjunctivitis characterized by the recurrent formation of wood-like, fibrin-rich membranes on the conjunctival surface. It is often associated with plasminogen deficiency and can affect one or both eyes.

Use this code when documentation specifies ligneous conjunctivitis without laterality specified. This diagnosis is typically made based on clinical presentation and confirmed by histopathological examination of the membranes. Documentation should clearly indicate the presence of this specific type of conjunctivitis.

• Ensure documentation explicitly states "ligneous conjunctivitis" to support this specific code.
• If laterality is specified (right or left eye), use the more specific codes H10.511 or H10.512.
• Consider co-reporting codes for underlying conditions, such as plasminogen deficiency (e.g., D68.9), if documented and clinically relevant.