ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.4 > S20.46 > S20.469 S20.469 Insect bite (nonvenomous) of unspecified back wall of thorax Non-Billable/Non-Specific Codes S20.469A..., initial encounterS20.469D..., subsequent encounterS20.469S..., sequela