Triplet preg, trichorionic/triamniotic, second trimester

This code signifies a pregnancy involving three fetuses, where each fetus has its own chorion and amnion. This distinct placental and amniotic sac arrangement is observed during the second trimester of gestation.

Apply this code when documentation clearly indicates a triplet pregnancy with a trichorionic/triamniotic placentation, and the patient is currently in her second trimester. Ultrasound reports confirming the number of fetuses and the specific chorionicity/amnionicity, along with gestational age, support its use.

• Ensure the documentation explicitly states "trichorionic/triamniotic" and not just "triplet pregnancy" to use this specific code.
• Verify the gestational age falls within the second trimester (typically weeks 14 through 27+6 days).
• Do not confuse with codes for dichorionic/triamniotic or other chorionicity/amnionicity variations.