ICD-10-CM > S00-T88 > T20-T25 > T21 > T21.0 T21.0 Burn of unspecified degree of trunk Non-Billable/Non-Specific Use Additional external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92) Codes T21.00Burn of unspecified degree of trunk, unspecified siteT21.00XA..., initial encounterT21.00XD..., subsequent encounterT21.00XS..., sequelaT21.01Burn of unspecified degree of chest wallT21.01XA..., initial encounterT21.01XD..., subsequent encounterT21.01XS..., sequelaT21.02Burn of unspecified degree of abdominal wallT21.02XA..., initial encounterT21.02XD..., subsequent encounterT21.02XS..., sequelaT21.03Burn of unspecified degree of upper backT21.03XA..., initial encounterT21.03XD..., subsequent encounterT21.03XS..., sequelaT21.04Burn of unspecified degree of lower backT21.04XA..., initial encounterT21.04XD..., subsequent encounterT21.04XS..., sequelaT21.05Burn of unspecified degree of buttockT21.05XA..., initial encounterT21.05XD..., subsequent encounterT21.05XS..., sequelaT21.06Burn of unspecified degree of male genital regionT21.06XA..., initial encounterT21.06XD..., subsequent encounterT21.06XS..., sequelaT21.07Burn of unspecified degree of female genital regionT21.07XA..., initial encounterT21.07XD..., subsequent encounterT21.07XS..., sequelaT21.09Burn of unspecified degree of other site of trunkT21.09XA..., initial encounterT21.09XD..., subsequent encounterT21.09XS..., sequela