ICD-10-CM > S00-T88 > T51-T65 > T63 > T63.3 > T63.31 > T63.311 T63.311 Toxic effect of venom of black widow spider, accidental (unintentional) Non-Billable/Non-Specific Codes T63.311A..., initial encounterT63.311D..., subsequent encounterT63.311S..., sequela