ICD-10-CM > S00-T88 > T20-T25 > T21 > T21.1 > T21.12 T21.12 Burn of first degree of abdominal wall Non-Billable/Non-Specific Applicable To Burn of first degree of flankBurn of first degree of groin Codes T21.12XA..., initial encounterT21.12XD..., subsequent encounterT21.12XS..., sequela