T23.62 - Corrosion of second degree of single finger (nail) except thumb T23.6 - Corrosion of second degree of wrist and hand T23.62 - Corrosion of second degree of single finger (nail) except thumb T23.621 - Corrosion of second degree of single right finger (nail) except thumb T23.622 - Corrosion of second degree of single left finger (nail) except thumb T23.629 - Corrosion of second degree of unspecified single finger (nail) except thumb