Pnctr w/o fb of abd wall, unsp q w penet perit cav, init

This code signifies a penetrating injury to the abdominal wall, such as from a sharp object, that has breached the peritoneum and entered the abdominal cavity. Importantly, there is no foreign object retained within the wound. The specific quadrant of the abdomen is not documented.

This code is appropriate for initial encounters where a patient presents with a stab wound or similar puncture injury to the abdomen, and surgical exploration or imaging confirms peritoneal penetration without a retained foreign body. It applies when the exact location on the abdominal wall (e.g., right upper, left lower) is not specified in the medical record.

• Ensure documentation explicitly states "penetration into peritoneal cavity" to justify use of this code.
• If a foreign body is present, a different code from the S31.6 series would be more appropriate.
• If the specific abdominal quadrant is documented, a more precise code (e.g., S31.630A-S31.638A) should be selected.