Quad preg, quadrachorionic/quadra-amniotic, third trimester

This code signifies a pregnancy involving four fetuses, each with its own chorion and amniotic sac, and currently in the third trimester. This specific chorionicity and amnionicity (quadrachorionic/quadra-amniotic) indicates that each fetus developed from a separate fertilized egg.

Apply this code when documentation clearly indicates a quadruplet gestation where each fetus has its own placenta and amniotic sac, and the patient is beyond 28 weeks of gestation. This code is supported by ultrasound reports detailing four separate gestational sacs, four distinct placentas, and fetal biometry consistent with the third trimester.

• Always confirm the chorionicity and amnionicity from the ultrasound report; do not assume based on the number of fetuses.
• Ensure the gestational age is accurately documented as third trimester (28 weeks 0 days to delivery).
• Sequence this code as the primary diagnosis for the pregnancy encounter, followed by any associated complications.