ICD-10 Code K67 – Disorders of peritoneum in infectious diseases classified elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K67 – Disorders of peritoneum in infectious diseases classified elsewhere
What it is
K67 identifies peritoneal disorders caused by an underlying infectious disease classified elsewhere. Use it when the peritoneum is affected as a manifestation of another infection, not as a primary peritoneal diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Findings may include peritoneal inflammation, abdominal pain, tenderness, or other signs linked to the underlying infectious process.
When to use this code
Use K67 when the record states a peritoneal disorder is due to an infection coded elsewhere, and the provider links the conditions. This is appropriate for secondary peritoneal involvement, not for a standalone peritoneal disease. Check documentation for the causative infection and any required additional codes.
Do not use for
Do not use K67 for primary peritonitis, postoperative peritoneal complications, or nonspecific abdominal pain without documented peritoneal involvement. If the infectious cause is not clear, check documentation.
Coding tip
Always code the underlying infection first when supported, and use K67 only when the record explicitly connects the peritoneal disorder to that infection.