ICD-10-CM > S00-T88 > T20-T25 > T20 > T20.2 > T20.20 T20.20 Burn of second degree of head, face, and neck, unspecified site Non-Billable/Non-Specific Codes T20.20XA..., initial encounterT20.20XD..., subsequent encounterT20.20XS..., sequela