Placentitis, unspecified trimester, fetus 4

This code signifies inflammation of the placenta, known as placentitis, occurring at an unspecified point during the pregnancy. It specifically indicates that the condition affects the fourth fetus in a multiple gestation pregnancy.

Use this code when documentation confirms placentitis in a multifetal pregnancy where the specific trimester of onset is not recorded, and the condition is attributed to the fourth fetus. This diagnosis is typically supported by pathology reports, ultrasound findings, or clinical notes detailing placental abnormalities and inflammation.

• Ensure documentation clearly identifies the affected fetus number in multiple gestations.
• Avoid using this code if the trimester of onset is specified; instead, use a more specific O41.14x- code.
• Always sequence this code after the primary obstetric complication or condition, if applicable.