ICD-10-CM > S00-T88 > T51-T65 > T63 > T63.3 > T63.31 > T63.314 T63.314 Toxic effect of venom of black widow spider, undetermined Non-Billable/Non-Specific Codes T63.314A..., initial encounterT63.314D..., subsequent encounterT63.314S..., sequela