Filamentary keratitis, right eye

This code describes an inflammatory corneal condition characterized by the presence of fine, thread-like strands (filaments) composed of epithelial cells and mucus adhering to the corneal surface. These filaments can cause significant ocular discomfort, foreign body sensation, and blurred vision.

Use this code when documentation specifies filamentary keratitis affecting the right eye. This diagnosis is typically made during an ophthalmological examination, often supported by slit-lamp findings. Documentation should clearly indicate the laterality of the condition.

• Ensure the documentation specifies "right eye" to accurately assign this laterality-specific code.
• Do not confuse with other forms of keratitis (e.g., superficial punctate keratitis, ulcerative keratitis) unless filament formation is explicitly noted.
• Consider coding any underlying causes or associated conditions, such as severe dry eye syndrome (e.g., H04.12-), if documented.