ICD-10-CM > S00-T88 > T51-T65 > T63 > T63.3 > T63.39 > T63.394 T63.394 Toxic effect of venom of other spider, undetermined Non-Billable/Non-Specific Codes T63.394A..., initial encounterT63.394D..., subsequent encounterT63.394S..., sequela