Labor and delivery complicated by vasa previa, fetus 1

This code signifies a pregnancy where the fetal blood vessels (umbilical or placental) are positioned across or near the internal cervical os, unprotected by Wharton's jelly or placental tissue, and are thus at risk of rupture during labor or membrane rupture. This condition poses a significant threat of fetal hemorrhage and death due to compression or tearing of these vessels.

Apply this code when documentation explicitly states labor and delivery is complicated by vasa previa affecting the first fetus. This diagnosis is typically made antenatally via ultrasound or confirmed during labor when bleeding occurs upon membrane rupture. Documentation should clearly indicate the presence of vasa previa and its impact on the labor and delivery process.

• Ensure the documentation specifies "fetus 1" when coding for multiple gestations, as laterality/fetus number is crucial for accurate reporting.
• Distinguish from placenta previa (O44.-) where the placenta itself covers the cervix, not just unprotected vessels.
• Sequence this code as a principal diagnosis when it is the primary reason for the admission for delivery, or as a secondary diagnosis if another complication is the principal reason.