T24.409 - Corrosion of unspecified degree of unspecified site of unspecified lower limb, except ankle and foot T24.4 - Corrosion of unspecified degree of lower limb, except ankle and foot T24.40 - Corrosion of unspecified degree of unspecified site of lower limb, except ankle and foot T24.409 - Corrosion of unspecified degree of unspecified site of unspecified lower limb, except ankle and foot