ICD-10-CM > S00-T88 > T20-T25 > T21 > T21.0 > T21.03 T21.03 Burn of unspecified degree of upper back Non-Billable/Non-Specific Applicable To Burn of unspecified degree of interscapular region Codes T21.03XA..., initial encounterT21.03XD..., subsequent encounterT21.03XS..., sequela