ICD-10-CM > S00-T88 > T51-T65 > T63 > T63.3 > T63.31 > T63.313 T63.313 Toxic effect of venom of black widow spider, assault Non-Billable/Non-Specific Codes T63.313A..., initial encounterT63.313D..., subsequent encounterT63.313S..., sequela