Paralytic lagophthalmos right eye, upper and lower eyelids

This code signifies the inability to completely close the right eye due to paralysis of the orbicularis oculi muscle, affecting both the upper and lower eyelids. This paralytic condition leads to exposure of the ocular surface, potentially causing dryness, irritation, and corneal damage.

Apply this code when documentation explicitly states paralytic lagophthalmos affecting the right eye, with involvement of both upper and lower eyelids. This typically occurs secondary to facial nerve palsy (e.g., Bell's palsy, trauma, tumor) or other neurological conditions impacting eyelid function.

• Ensure laterality (right eye) is clearly documented.
• Distinguish from mechanical lagophthalmos, which has different underlying causes and coding.
• Code any underlying cause of the facial nerve paralysis (e.g., G51.0 for Bell's palsy) as a primary diagnosis if applicable.