Renal and perinephric abscess

This code represents a localized collection of pus within the kidney tissue itself (renal abscess) or in the fatty tissue surrounding the kidney (perinephric abscess). These are serious bacterial infections that can cause significant pain, fever, and systemic illness. They often arise as complications of urinary tract infections or other kidney conditions.

Use this code when documentation clearly indicates a diagnosis of either a renal abscess or a 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 between renal abscess and other kidney infections like pyelonephritis, which is a broader infection of the kidney parenchyma.
• Ensure documentation specifies the location (renal vs. perinephric) if known, though this code covers both.
• Consider sequencing this code as a principal diagnosis if it is the primary reason for the encounter and treatment.