Other retroperitoneal abscess

This code signifies an abscess located in the retroperitoneal space, excluding those specifically identified as psoas or subphrenic. It indicates a localized collection of pus within the anatomical region behind the peritoneum, often resulting from infection or inflammation of retroperitoneal organs or structures.

Use this code when documentation clearly identifies a retroperitoneal abscess that is not further specified as psoas (K68.11) or subphrenic (K65.0). This diagnosis is typically supported by imaging studies (e.g., CT scan, MRI) confirming the presence and location of the abscess, along with clinical signs of infection.

• Ensure the documentation specifies "retroperitoneal" and rules out psoas or subphrenic involvement.
• Code any underlying cause of the abscess, if known and documented, as a secondary diagnosis.
• Do not use this code for abscesses confined to specific retroperitoneal organs (e.g., kidney abscess, pancreatic abscess) which have their own distinct codes.