T23.71 - Corrosion of third degree of thumb (nail) T23.7 - Corrosion of third degree of wrist and hand T23.71 - Corrosion of third degree of thumb (nail) T23.711 - Corrosion of third degree of right thumb (nail) T23.712 - Corrosion of third degree of left thumb (nail) T23.719 - Corrosion of third degree of unspecified thumb (nail)