Velamentous insertion of umbilical cord, second trimester

This code describes a condition where the umbilical cord inserts into the fetal membranes (chorioamniotic membranes) rather than directly into the placental mass during the second trimester of pregnancy. This abnormal insertion leaves the umbilical vessels unprotected by Wharton's jelly as they course through the membranes to reach the placenta, making them vulnerable to compression or rupture.

This code is used when a velamentous insertion of the umbilical cord is identified during the second trimester of pregnancy, typically via ultrasound. Documentation should clearly state the diagnosis of velamentous cord insertion and the gestational age at the time of diagnosis.

• Ensure the documentation specifies "second trimester" for accurate code assignment.
• Do not confuse with marginal cord insertion (battledore placenta), which is a different condition.
• Sequence this code as a secondary diagnosis if it is an incidental finding or as a primary diagnosis if it is the main reason for the encounter (e.g., follow-up for this specific condition).