Conjoined twins

This code identifies a rare congenital anomaly where two fetuses are physically joined together, sharing organs or body parts. The extent of the fusion varies, leading to different classifications such as thoracopagus, omphalopagus, or craniopagus. This condition arises from an incomplete separation of a single fertilized egg.

Assign this code when documentation clearly indicates the presence of conjoined twins, typically diagnosed prenatally via ultrasound or MRI, or postnatally upon delivery. Use this code for the maternal record when the pregnancy involves conjoined twins, or for the infant's record if born with this condition.

• Specify the type of conjoined twins (e.g., thoracopagus) if documented, as this may impact future coding systems.
• Do not use for multiple gestations that are not physically conjoined.
• Consider additional codes for any associated congenital anomalies or complications.