ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.4 > S20.47 > S20.479 S20.479 Other superficial bite of unspecified back wall of thorax Non-Billable/Non-Specific Codes S20.479A..., initial encounterS20.479D..., subsequent encounterS20.479S..., sequela