ICD-10-CM > S00-T88 > T15-T19 > T18 > T18.5 T18.5 Foreign body in anus and rectum Non-Billable/Non-Specific Applicable To Foreign body in rectosigmoid (junction) Codes T18.5XXA..., initial encounterT18.5XXD..., subsequent encounterT18.5XXS..., sequela