Abnormal innervation syndrome left upper eyelid

This code describes a neurological disorder affecting the left upper eyelid, characterized by aberrant nerve supply. This abnormal innervation can lead to involuntary movements or unusual positioning of the eyelid, often resulting from misdirected nerve regeneration following injury or congenital anomalies.

Use this code when documentation specifies abnormal innervation syndrome affecting the left upper eyelid. This diagnosis is typically made based on clinical examination revealing synkinetic movements, such as the eyelid retracting or twitching during jaw movement (Marcus Gunn phenomenon) or other non-physiological eyelid movements.

• Ensure the laterality is precisely documented as "left upper eyelid" to support this specific code.
• Distinguish from other eyelid disorders like ptosis (H02.4-) or blepharospasm (G24.5) which have different underlying etiologies.
• Look for documentation of the specific type of abnormal innervation, if known, though not required for this code.