T23.21 - Burn of second degree of thumb (nail) T23.2 - Burn of second degree of wrist and hand T23.21 - Burn of second degree of thumb (nail) T23.211 - Burn of second degree of right thumb (nail) T23.212 - Burn of second degree of left thumb (nail) T23.219 - Burn of second degree of unspecified thumb (nail)