T33.7 - Superficial frostbite of knee and lower leg T33 - Superficial frostbite T33.7 - Superficial frostbite of knee and lower leg T33.70 - Superficial frostbite of unspecified knee and lower leg T33.71 - Superficial frostbite of right knee and lower leg T33.72 - Superficial frostbite of left knee and lower leg