ICD-10-CM > S00-T88 > T80-T88 > T80 > T80.8 > T80.81 > T80.818 T80.818 Extravasation of other vesicant agent Non-Billable/Non-Specific Applicable To Infiltration of other vesicant agent Codes T80.818A..., initial encounterT80.818D..., subsequent encounterT80.818S..., sequela