Lac w/o fb ofbd wall, unsp flank with penet perit cav, init

This code signifies a cut or tear in the abdominal wall, specifically in an unspecified flank region, that extends through to the peritoneal cavity. There is no foreign object embedded in the wound. This diagnosis indicates the initial presentation and treatment of such an injury.

This code is appropriate for patients presenting with a stab wound or other penetrating trauma to the flank area where the injury is confirmed to have breached the abdominal lining. It should be used when surgical exploration or imaging confirms peritoneal penetration and no foreign body is found within the wound.

• Ensure documentation clearly specifies "unspecified flank" if the exact side (left or right) is not documented.
• Verify that the medical record explicitly states "penetration into peritoneal cavity" and "without foreign body."
• Remember to use a subsequent encounter code (S31.61AD) or sequela code (S31.61AS) for follow-up care after the initial treatment.