ICD-10-CM > S00-T88 > T20-T25 > T21 > T21.0 > T21.01 T21.01 Burn of unspecified degree of chest wall Non-Billable/Non-Specific Applicable To Burn of unspecified degree of breast Codes T21.01XA..., initial encounterT21.01XD..., subsequent encounterT21.01XS..., sequela