Placenta accreta, second 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 second trimester of pregnancy. This condition can lead to severe hemorrhage during delivery due to the placenta's inability to separate normally.

Apply this code when documentation clearly indicates a diagnosis of placenta accreta identified between 14 weeks 0 days and 27 weeks 6 days of gestation. Supporting documentation includes ultrasound reports, MRI findings, or physician notes confirming the abnormal placental implantation depth during the second trimester.

• Ensure the documentation specifies "accreta" and not "increta" or "percreta," as these have distinct codes.
• Verify the gestational age at the time of diagnosis to confirm it falls within the second trimester.
• Sequence this code as a primary diagnosis when the placenta accreta is the reason for the encounter, or as a secondary diagnosis if it's an incidental finding or comorbidity.