Neurotrophic keratoconjunctivitis, unspecified eye

This code describes a degenerative corneal condition characterized by impaired corneal sensation, leading to epithelial defects, ulceration, and potential perforation. It results from damage to the trigeminal nerve, which compromises the trophic support and reflex tearing necessary for corneal health. The "unspecified eye" indicates that the laterality of the condition is not documented.

Use this code when the medical record clearly documents neurotrophic keratoconjunctivitis without specifying whether it affects the right or left eye. This diagnosis is typically supported by findings of reduced corneal sensation, persistent epithelial defects, and a history of conditions predisposing to trigeminal nerve damage (e.g., herpes zoster ophthalmicus, corneal surgery, diabetes).

• Always attempt to clarify laterality (right, left, or bilateral) with the provider to use a more specific code if possible.
• Do not confuse this with other forms of keratoconjunctivitis that do not involve neurotrophic impairment, such as allergic or infectious types.
• Code any underlying cause of the trigeminal nerve damage (e.g., G50.0 for trigeminal neuralgia, B02.30 for herpes zoster ophthalmicus) as a secondary diagnosis.