Psoas muscle abscess

This code signifies an encapsulated collection of pus within the psoas muscle, typically resulting from an infection. It represents a deep-seated abscess affecting this specific muscle group, which can cause significant pain and systemic symptoms.

Apply this code when documentation explicitly states a diagnosis of psoas muscle abscess. Supporting documentation would include imaging reports (e.g., CT, MRI) confirming the abscess location and clinical notes detailing the patient's symptoms and diagnostic findings.

• Differentiate from other abdominal or retroperitoneal abscesses; ensure the documentation specifies the psoas muscle.
• Code any underlying infectious organism (e.g., Staphylococcus aureus) as an additional diagnosis, if identified.
• Consider sequencing this code as the primary diagnosis if it is the main reason for the encounter and treatment.