ICD-10-CM > S00-T88 > T80-T88 > T81 > T81.6 T81.6 Acute reaction to foreign substance accidentally left during a procedure Non-Billable/Non-Specific Type 2 Excludes complications of foreign body accidentally left in body cavity or operation wound following procedure (T81.5-) Codes T81.60Unspecified acute reaction to foreign substance accidentally left during a procedureT81.60XA..., initial encounterT81.60XD..., subsequent encounterT81.60XS..., sequelaT81.61Aseptic peritonitis due to foreign substance accidentally left during a procedureT81.61XA..., initial encounterT81.61XD..., subsequent encounterT81.61XS..., sequelaT81.69Other acute reaction to foreign substance accidentally left during a procedureT81.69XA..., initial encounterT81.69XD..., subsequent encounterT81.69XS..., sequela