ICD-10-CM > S00-T88 > T51-T65 > T63 > T63.5 > T63.59 > T63.594 T63.594 Toxic effect of contact with other venomous fish, undetermined Non-Billable/Non-Specific Codes T63.594A..., initial encounterT63.594D..., subsequent encounterT63.594S..., sequela