T23.76 - Corrosion of third degree of back of hand T23.7 - Corrosion of third degree of wrist and hand T23.76 - Corrosion of third degree of back of hand T23.761 - Corrosion of third degree of back of right hand T23.762 - Corrosion of third degree of back of left hand T23.769 - Corrosion of third degree back of unspecified hand