Placenta accreta, first trimester

This code signifies an abnormal attachment of the placenta to the uterine wall, specifically when the chorionic villi invade the myometrium, occurring during the first trimester of pregnancy. This condition can lead to severe hemorrhage during delivery due to the placenta's inability to detach normally.

Apply this code when documentation clearly indicates a diagnosis of placenta accreta identified or suspected during the first trimester of pregnancy. This diagnosis is typically made via ultrasound or MRI findings, often in patients with a history of uterine surgery, such as prior cesarean sections.

• Ensure the documentation explicitly states "first trimester" for accurate code assignment.
• Distinguish from placenta increta or percreta, which involve deeper invasion and have different codes.
• Code any associated complications, such as hemorrhage, in addition to this primary diagnosis.