ICD-10-CM > S00-T88 > T20-T25 > T24 > T24.3 > T24.39 > T24.399 T24.399 Burn of third degree of multiple sites of unspecified lower limb, except ankle and foot Non-Billable/Non-Specific Codes T24.399A..., initial encounterT24.399D..., subsequent encounterT24.399S..., sequela