T33 - Superficial frostbite
T33.4 - Superficial frostbite of arm
Excludes 2:
-superficial frostbite of wrist and hand T33.5-)
T33.40 - Superficial frostbite of unspecified arm
T33.41 - Superficial frostbite of right arm
T33.42 - Superficial frostbite of left arm