Abscess of lung without pneumonia

This code signifies a localized collection of pus within the lung parenchyma, not associated with an active pneumonia. It represents a destructive process forming a cavity filled with necrotic debris and inflammatory cells. This condition typically results from bacterial infection, often following aspiration or as a complication of other pulmonary processes.

Apply this code when documentation clearly states "lung abscess" and explicitly excludes concurrent pneumonia. This is appropriate for cases where the abscess is the primary diagnosis or a significant secondary condition. Supporting documentation would include imaging reports (e.g., chest X-ray, CT scan) confirming an abscess cavity and clinical notes detailing the absence of widespread pneumonic consolidation.

• Ensure documentation differentiates between lung abscess and cavitating pneumonia; this code specifically excludes pneumonia.
• Do not use this code if the abscess is a complication of an underlying pneumonia; in such cases, code the pneumonia first.
• Look for specific mention of "without pneumonia" or clear clinical context indicating the absence of active pneumonia.