ICD-10-CM > S00-T88 > T20-T25 > T21 > T21.2 > T21.25 T21.25 Burn of second degree of buttock Non-Billable/Non-Specific Applicable To Burn of second degree of anus Codes T21.25XA..., initial encounterT21.25XD..., subsequent encounterT21.25XS..., sequela