ICD-10-CM > S00-T88 > T80-T88 > T81 > T81.5 > T81.52 > T81.521 T81.521 Obstruction due to foreign body accidentally left in body following infusion or transfusion Non-Billable/Non-Specific Codes T81.521A..., initial encounterT81.521D..., subsequent encounterT81.521S..., sequela