Acute reaction to foreign substance accidentally left during a procedure not elsewhere classified
Convert to ICD-10-CM: 
998.7 converts approximately to:
- 2015/16 ICD-10-CM T81.61XA Aseptic peritonitis due to foreign substance accidentally left during a procedure, initial encounterOr: 
- 2015/16 ICD-10-CM T81.69XA Other acute reaction to foreign substance accidentally left during a procedure, initial encounter