Paralytic lagophthalmos left lower eyelid

This code signifies an inability to fully close the left lower eyelid due to paralysis of the orbicularis oculi muscle. This paralytic condition results in exposure of the ocular surface, potentially leading to dryness, irritation, and corneal damage.

Use this code when documentation specifies paralytic lagophthalmos affecting the lower eyelid of the left eye. This typically occurs secondary to facial nerve palsy (Bell's palsy, trauma, tumor) or other neurological conditions impacting eyelid function. Documentation should clearly indicate the laterality and the paralytic etiology.

• Differentiate from cicatricial lagophthalmos (H02.21-) which is due to scarring, not paralysis.
• Ensure laterality (left lower eyelid) is explicitly documented to avoid unspecified codes.
• Consider coding any underlying cause of the paralysis (e.g., G51.0 for Bell's palsy) as a primary diagnosis if applicable.