Renal and perinephric abscess

This code represents a localized collection of pus within the kidney (renal abscess) or in the tissues surrounding the kidney (perinephric abscess). These are typically infectious processes, often bacterial, leading to inflammation and tissue destruction.

Assign this code when documentation clearly indicates a diagnosis of a renal or perinephric abscess. This diagnosis is typically supported by imaging studies (e.g., CT scan, ultrasound) confirming the presence and location of the abscess, along with clinical signs and symptoms of infection.

• Differentiate from pyelonephritis (N10.0) or other kidney infections without abscess formation.
• Code any associated infectious organism (e.g., B95-B97) as an additional diagnosis, if identified.
• Ensure documentation specifies "abscess" to avoid confusion with other renal inflammatory conditions.