Peripheral corneal degeneration, left eye

This code signifies a non-inflammatory thinning or breakdown of the peripheral cornea in the left eye. This degeneration can lead to changes in corneal shape, vision impairment, and, in severe cases, corneal perforation. It encompasses various forms of peripheral corneal thinning, such as Terrien's marginal degeneration or furrow degeneration.

Apply this code when documentation specifies a diagnosis of peripheral corneal degeneration affecting the left eye. This diagnosis is typically made by an ophthalmologist based on slit-lamp examination findings, corneal topography, and patient history. Ensure the medical record clearly indicates the left eye as the affected side.

• Always confirm the laterality (left, right, or bilateral) documented by the physician.
• Distinguish from central corneal degenerations, which have different ICD-10-CM codes.
• Look for associated conditions or complications, such as corneal ectasia or perforation, which may require additional coding.