Malformation of placenta, unspecified, second trimester

This code signifies an uncharacterized structural abnormality of the placenta identified during the second trimester of pregnancy. This malformation could involve the size, shape, or attachment of the placenta, without further specification of the exact anomaly.

Use this code when documentation indicates a placental malformation was identified between 14 weeks 0 days and 27 weeks 6 days gestation, and the specific type of malformation (e.g., circumvallate, succenturiate lobe) is not documented or is unknown. This code is appropriate when imaging reports (e.g., ultrasound) describe a placental anomaly but lack definitive diagnostic detail.

• Always strive for a more specific code if the type of placental malformation is documented (e.g., O43.11- for circumvallate placenta).
• Ensure the documentation clearly specifies "second trimester" for accurate trimester assignment.
• Do not use this code if the malformation is identified in the first or third trimester; use the appropriate trimester-specific code.