Lesion of medial popliteal nerve, right lower limb

This code signifies a specific nerve lesion affecting the medial popliteal nerve (also known as the tibial nerve) in the right lower limb. This condition typically presents with sensory disturbances (e.g., numbness, tingling) and/or motor weakness in the muscles innervated by this nerve, such as the calf muscles and intrinsic foot muscles.

Use this code when documentation clearly indicates a lesion, injury, or entrapment neuropathy specifically affecting the right medial popliteal nerve. This diagnosis is often supported by neurological examination findings, nerve conduction studies, or electromyography (EMG) confirming tibial nerve involvement distal to the popliteal fossa.

• Differentiate from common peroneal nerve lesions (G57.3-) which affect a different nerve in the same anatomical region.
• Ensure laterality (right lower limb) is explicitly documented to support this specific code.
• Consider an additional code for the underlying cause of the lesion, if known (e.g., trauma, compression).