Placenta increta, first trimester

This code signifies a condition where the placental villi invade the myometrium without penetrating the uterine serosa, occurring during the first trimester of pregnancy. It represents an abnormal and deep attachment of the placenta to the uterine wall, posing significant risks for hemorrhage and other complications.

Use this code for a pregnant patient in her first trimester diagnosed with placenta increta. Documentation should clearly state the trimester and the specific depth of placental invasion into the myometrium, distinguishing it from accreta or percreta.

• Ensure the documentation explicitly states "increta" and "first trimester" to support this specific code.
• Differentiate carefully from O43.21- (placenta accreta) and O43.23- (placenta percreta) based on the depth of myometrial invasion.
• Always sequence this code as a secondary diagnosis when a primary obstetric complication or reason for encounter is present.