Acute appendicitis with generalized peritonitis

This code signifies an acute inflammation of the appendix that has progressed to involve the entire abdominal cavity with peritonitis. It indicates a severe and widespread infection and inflammation of the peritoneal lining, typically resulting from a ruptured appendix.

Use this code when documentation clearly states acute appendicitis with evidence of generalized peritonitis. This diagnosis is often supported by surgical findings (e.g., purulent fluid throughout the abdomen, diffuse inflammation of the peritoneum) and clinical signs such as diffuse abdominal tenderness, rigidity, and rebound.

• Ensure documentation specifies "generalized" peritonitis; localized peritonitis would be coded differently.
• Do not use this code if the appendicitis is described as chronic or recurrent.
• Look for operative reports detailing the extent of peritonitis and the condition of the appendix.