Placentitis, second trimester, fetus 1

This code signifies inflammation of the placenta occurring during the second trimester of pregnancy, specifically affecting the first fetus in a multiple gestation. Placentitis can be caused by infection or other inflammatory processes, potentially leading to adverse pregnancy outcomes.

Use this code when documentation clearly indicates placentitis diagnosed in a pregnant patient during her second trimester, and it is specified as affecting fetus 1 in a multiple gestation. Supporting documentation would include pathology reports, ultrasound findings, or physician notes detailing the placental inflammation and its gestational timing.

• Ensure the trimester is explicitly documented as "second trimester" (weeks 14-27+6 days).
• Verify the affected fetus is clearly identified as "fetus 1" in cases of multiple gestation.
• Code any associated infectious agent (e.g., bacterial, viral) separately, if identified and documented.