ICD-10-CM > S00-T88 > T20-T25 > T20 > T20.3 > T20.39 T20.39 Burn of third degree of multiple sites of head, face, and neck Non-Billable/Non-Specific Codes T20.39XA..., initial encounterT20.39XD..., subsequent encounterT20.39XS..., sequela