Band keratopathy, left eye

This code signifies the presence of band keratopathy in the left eye. Band keratopathy is a degenerative corneal condition characterized by a horizontal band-like opacity composed of calcium deposits in the superficial layers of the cornea, typically in the interpalpebral fissure. It can lead to decreased vision, irritation, and foreign body sensation.

Use this code when documentation explicitly states a diagnosis of band keratopathy affecting the left eye. This condition is often associated with chronic ocular inflammation, hypercalcemia, or inherited metabolic disorders. Supporting documentation should include findings from a slit lamp examination confirming the characteristic corneal deposits.

• Ensure the laterality is correctly identified; separate codes exist for the right eye (H18.421) and bilateral involvement (H18.423).
• Do not confuse with other corneal opacities or dystrophies; band keratopathy has specific clinical features.
• Consider coding any underlying systemic conditions (e.g., hypercalcemia) or primary ocular diseases (e.g., chronic uveitis) that may be contributing to the band keratopathy.