Chronic follicular conjunctivitis, left eye

This diagnosis code signifies a persistent inflammation of the conjunctiva, characterized by the presence of lymphoid follicles, specifically affecting the left eye. It indicates a long-standing or recurring form of conjunctivitis where these small, elevated lesions are a prominent feature.

Apply this code when documentation clearly indicates a chronic follicular conjunctivitis impacting the left eye. This typically involves a history of persistent symptoms such as redness, irritation, and discharge, with ophthalmic examination confirming follicular changes. Supporting documentation should include physician notes detailing the chronicity and laterality.

• Ensure the documentation specifies "chronic" and "follicular" to differentiate from acute or other forms of conjunctivitis.
• Verify laterality; this code is specific to the left eye. Use H10.431 for the right eye or H10.433 for bilateral involvement.
• Look for an underlying cause if documented (e.g., viral, chlamydial) and code it as a secondary diagnosis if applicable.