Velamentous insertion of umbilical cord, unsp trimester

This code describes a condition where the umbilical cord inserts into the fetal membranes (chorioamniotic membrane) rather than directly into the placental mass. The umbilical vessels then travel unprotected within the membranes before reaching the placenta, making them vulnerable to compression or rupture. This can lead to fetal compromise during pregnancy or labor.

Use this code when documentation indicates a velamentous insertion of the umbilical cord, and the specific trimester of diagnosis is not recorded. This diagnosis is typically made via ultrasound during routine prenatal care or when complications arise. Documentation should clearly state "velamentous insertion" without specifying the trimester.

• Do not use this code if the trimester is documented; instead, select the appropriate trimester-specific code (O43.121, O43.122, O43.123).
• This code is for the maternal condition; consider additional codes for any associated fetal complications (e.g., fetal growth restriction, fetal distress).
• Ensure the documentation explicitly states "velamentous insertion" to support this diagnosis.