ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.9 > S20.90 S20.90 Unspecified superficial injury of unspecified parts of thorax Non-Billable/Non-Specific Applicable To Superficial injury of thoracic wall NOS Codes S20.90XA..., initial encounterS20.90XD..., subsequent encounterS20.90XS..., sequela