ICD-10-CM > S00-T88 > T51-T65 > T61 > T61.7 > T61.78 > T61.781 T61.781 Other shellfish poisoning, accidental (unintentional) Non-Billable/Non-Specific Codes T61.781A..., initial encounterT61.781D..., subsequent encounterT61.781S..., sequela