ICD-10-CM > S00-T88 > S20-S29 > S21 > S21.9 > S21.91 S21.91 Laceration without foreign body of unspecified part of thorax Non-Billable/Non-Specific Codes S21.91XA..., initial encounterS21.91XD..., subsequent encounterS21.91XS..., sequela