T24.509 - Corrosion of first degree of unspecified site of unspecified lower limb, except ankle and foot T24.5 - Corrosion of first degree of lower limb, except ankle and foot T24.50 - Corrosion of first degree of unspecified site of lower limb, except ankle and foot T24.509 - Corrosion of first degree of unspecified site of unspecified lower limb, except ankle and foot