K68.1Non-Billable (Header)Retroperitoneal abscessChild CodesK68.11Postprocedural retroperitoneal abscessK68.12Psoas muscle abscessHCC 78K68.19Other retroperitoneal abscessHCC 78Code Hierarchy└K68Disorders of retroperitoneum└K68.1Retroperitoneal abscess└K68.1Retroperitoneal abscess