ICD-10-CM > S00-T88 > T51-T65 > T63 > T63.4 > T63.45 > T63.454 T63.454 Toxic effect of venom of hornets, undetermined Non-Billable/Non-Specific Codes T63.454A..., initial encounterT63.454D..., subsequent encounterT63.454S..., sequela