Mechanical lagophthalmos left eye, unspecified eyelid

This code signifies an inability to fully close the left eyelid due to a mechanical obstruction or restriction, rather than nerve paralysis. This results in exposure of the ocular surface, potentially leading to dryness, irritation, and corneal damage. The specific eyelid (upper or lower) is not specified.

Use this code when documentation clearly indicates mechanical lagophthalmos affecting the left eye, without specifying which eyelid is involved. This often occurs due to scarring, tumor, or other physical impediments preventing complete lid closure. Supporting documentation should describe the mechanical nature of the lagophthalmos and its laterality.

• Differentiate from paralytic lagophthalmos (H02.21-) which is due to nerve dysfunction.
• Ensure documentation specifies "left eye" and the mechanical etiology.
• If the specific eyelid (upper or lower) is known, use a more precise code from the H02.22- subcategory.