K65.0
Acute peritonitis
Coding guidance (WHO 2019)
Abscess (of): abdominopelvic mesenteric omentum peritoneum retrocaecal retroperitoneal subdiaphragmatic subhepatic subphrenic Peritonitis (acute): generalized pelvic, male subphrenic suppurative Use additional code (B95-B98), if desired, to identify infectious agent.