G57 - Mononeuropathies of lower limb
G57.4 - Lesion of medial popliteal nerve
G57.40 - Lesion of medial popliteal nerve, unspecified lower limb
G57.41 - Lesion of medial popliteal nerve, right lower limb
G57.42 - Lesion of medial popliteal nerve, left lower limb