Quad preg, quadrachorionic/quadra-amniotic, first trimester

This code identifies a pregnancy involving four fetuses, where each fetus has its own chorion and amnion. This specific chorionicity/amnionicity indicates that all four fetuses developed from separate fertilized eggs (quadrazygotic). The diagnosis is made during the first trimester of gestation.

Use this code for a confirmed quadruplet pregnancy where ultrasound or other diagnostic imaging clearly indicates a quadrachorionic/quadra-amniotic presentation. This applies when the patient is in her first trimester of pregnancy. Documentation should explicitly state the number of fetuses, their chorionicity/amnionicity, and the gestational age.

• Always confirm the chorionicity and amnionicity through imaging reports; do not assume based on the number of fetuses alone.
• Ensure the documentation specifies "first trimester" for accurate code assignment.
• Sequence this code as a primary diagnosis when the quadruplet pregnancy is the focus of the encounter, or as a secondary diagnosis when other conditions are primary.