Injury to posterior tibial nerve

This code signifies a traumatic injury affecting the posterior tibial nerve, a major nerve in the lower leg that supplies motor function to the calf muscles and sensation to the sole of the foot. Such injuries can result in motor weakness, sensory deficits, or pain in the foot and ankle.

Use this code when documentation clearly indicates a specific injury (e.g., laceration, contusion, crush injury, stretch injury) to the posterior tibial nerve. This typically arises from direct trauma to the lower leg or ankle, or complications from fractures or dislocations.

• Differentiate from general nerve compression syndromes (e.g., tarsal tunnel syndrome) unless the compression is directly due to an acute injury.
• Specify the open wound code if the injury involves an open wound to the lower leg.
• Consider an E-code to identify the external cause of the injury.