Peripheral corneal degeneration, unspecified eye

This code signifies a non-inflammatory thinning or deterioration of the peripheral cornea, the outermost edge of the clear front surface of the eye. This degeneration can lead to changes in corneal shape and integrity, potentially affecting vision. It represents a general diagnosis when the specific type of peripheral corneal degeneration is not documented.

Use this code when the medical record indicates a diagnosis of peripheral corneal degeneration without further specification of the type (e.g., Terrien's marginal degeneration, furrow degeneration). Documentation should clearly state "peripheral corneal degeneration" or a similar phrase, and the laterality is not specified.

• Avoid using this code if a more specific type of peripheral corneal degeneration is documented; instead, use the appropriate subcategory code.
• Ensure the documentation supports the "unspecified eye" aspect; if laterality is known, a more specific code (e.g., H18.461, H18.462, H18.463) should be used.
• This code should not be used for corneal ectasia or other forms of corneal thinning that are not specifically described as peripheral degeneration.