ICD-10-CM > S00-T88 > T80-T88 > T81 > T81.5 > T81.52 > T81.520 T81.520 Obstruction due to foreign body accidentally left in body following surgical operation Non-Billable/Non-Specific Codes T81.520A..., initial encounterT81.520D..., subsequent encounterT81.520S..., sequela