T31.2 - Burns involving 20-29% of body surface T31 - Burns classified according to extent of body surface involved T31.2 - Burns involving 20-29% of body surface
T31.20 - Burns involving 20-29% of body surface with 0% to 9% third degree burns T31.21 - Burns involving 20-29% of body surface with 10-19% third degree burns T31.22 - Burns involving 20-29% of body surface with 20-29% third degree burns