Malformation of placenta, unspecified, third trimester

This code signifies an uncharacterized structural abnormality of the placenta identified during the third trimester of pregnancy. It indicates that a placental malformation exists, but its specific type (e.g., circumvallate, succenturiate lobe, battledore placenta) has not been definitively diagnosed or documented.

Apply this code when documentation clearly states a placental malformation is present in the third trimester, but the specific nature of the malformation is not detailed. This is often used when an ultrasound or other imaging identifies an abnormal placental morphology without further diagnostic specificity.

• Do not use this code if a more specific placental malformation is documented; always code to the highest level of specificity.
• Ensure the documentation explicitly states "third trimester" or a gestational age consistent with the third trimester (28 weeks 0 days to 40 weeks 6 days).
• Review the medical record for any subsequent diagnostic clarification that would allow for a more specific code assignment.