T20.71 - Corrosion of third degree of ear [any part, except ear drum] T20.7 - Corrosion of third degree of head, face, and neck T20.71 - Corrosion of third degree of ear [any part, except ear drum] T20.711 - Corrosion of third degree of right ear [any part, except ear drum] T20.712 - Corrosion of third degree of left ear [any part, except ear drum] T20.719 - Corrosion of third degree of unspecified ear [any part, except ear drum]