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