Triplet preg w two or more monochorionic fetuses, third tri

This code identifies a pregnancy involving three fetuses, where at least two of the fetuses share a single chorion, and the pregnancy has progressed into the third trimester. This indicates a complex multiple gestation with increased risks due to the shared placental structures.

Use this code for a pregnant patient carrying triplets, with ultrasound or other imaging documentation confirming monochorionicity for two or more fetuses, and the gestational age is beyond 28 weeks. Documentation should clearly state the number of fetuses, chorionicity, and the current trimester.

• Ensure documentation specifies "triplet" pregnancy and "monochorionic" for at least two fetuses.
• Verify the gestational age falls within the third trimester (28 weeks 0 days to delivery).
• Do not confuse with codes for dichorionic or trichorionic triplet pregnancies.