ICD-10-CM > S00-T88 > S50-S59 > S50 > S50.8 > S50.86 S50.86 Insect bite (nonvenomous) of forearm Non-Billable/Non-Specific Codes S50.861Insect bite (nonvenomous) of right forearmS50.861A..., initial encounterS50.861D..., subsequent encounterS50.861S..., sequelaS50.862Insect bite (nonvenomous) of left forearmS50.862A..., initial encounterS50.862D..., subsequent encounterS50.862S..., sequelaS50.869Insect bite (nonvenomous) of unspecified forearmS50.869A..., initial encounterS50.869D..., subsequent encounterS50.869S..., sequela