Chlamydial peritonitis

This code represents an inflammatory condition of the peritoneum, the membrane lining the abdominal cavity, specifically caused by a Chlamydia infection. It indicates a chlamydial etiology for peritonitis, which can manifest with abdominal pain, fever, and tenderness.

Use this code when documentation clearly states peritonitis due to Chlamydia. This typically occurs in cases of pelvic inflammatory disease (PID) where the infection has spread to the peritoneum, often confirmed by laboratory testing for Chlamydia trachomatis or clinical suspicion in the presence of PID.

• Ensure the documentation explicitly links Chlamydia as the causative agent for the peritonitis.
• Do not use this code for peritonitis of unspecified origin or peritonitis due to other bacterial causes.
• Consider sequencing this code after codes for underlying conditions like PID (N73.x) if applicable, following ICD-10-CM sequencing guidelines.