T23.12 - Burn of first degree of single finger (nail) except thumb T23.1 - Burn of first degree of wrist and hand T23.12 - Burn of first degree of single finger (nail) except thumb T23.121 - Burn of first degree of single right finger (nail) except thumb T23.122 - Burn of first degree of single left finger (nail) except thumb T23.129 - Burn of first degree of unspecified single finger (nail) except thumb