ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.4 > S20.46 > S20.461 S20.461 Insect bite (nonvenomous) of right back wall of thorax Non-Billable/Non-Specific Codes S20.461A..., initial encounterS20.461D..., subsequent encounterS20.461S..., sequela