Foot drop, left foot

This code represents an abnormal gait characterized by weakness or paralysis of the muscles responsible for dorsiflexion of the left foot, leading to the foot dropping during the swing phase of walking. This can result in a steppage gait, where the patient lifts the thigh high to clear the foot. It is a symptom, not a disease, and often indicates underlying neurological or muscular dysfunction.

Assign this code when documentation specifically identifies foot drop affecting the left foot. This typically occurs in conditions such as peroneal nerve injury, sciatica, stroke, or multiple sclerosis. Supporting documentation should clearly state "left foot drop" or describe the characteristic gait abnormality localized to the left lower extremity.

• Always specify laterality (left, right, bilateral) when documented.
• Do not code foot drop as a primary diagnosis if the underlying cause is known and can be coded.
• Consider sequencing this code after the definitive diagnosis causing the foot drop, such as a nerve injury or neurological condition.