Abscess of mediastinum

This code signifies a localized collection of pus within the mediastinum, the central compartment of the thoracic cavity. It represents an inflammatory process, often infectious in origin, leading to tissue necrosis and purulent exudate formation in this critical anatomical space.

Apply this code when documentation clearly indicates a diagnosis of a mediastinal abscess. This diagnosis is typically supported by imaging studies (e.g., CT scan, MRI) showing a fluid collection with rim enhancement in the mediastinum, along with clinical signs of infection such as fever, chest pain, and elevated inflammatory markers.

• Differentiate from mediastinitis (J98.5), which is a more diffuse inflammation of the mediastinum without a discrete pus collection.
• Always code the underlying cause of the abscess (e.g., esophageal perforation, odontogenic infection) if known and documented.
• Ensure documentation specifies "abscess" and "mediastinum" to support accurate code assignment.