ICD-10-CM > S00-T88 > T51-T65 > T63 > T63.0 > T63.01 > T63.013 T63.013 Toxic effect of rattlesnake venom, assault Non-Billable/Non-Specific Codes T63.013A..., initial encounterT63.013D..., subsequent encounterT63.013S..., sequela