ICD-10-CM > S00-T88 > T20-T25 > T20 > T20.3 > T20.30 T20.30 Burn of third degree of head, face, and neck, unspecified site Non-Billable/Non-Specific Codes T20.30XA..., initial encounterT20.30XD..., subsequent encounterT20.30XS..., sequela