Maternal care for cesarean scar defect (isthmocele)

This code signifies specialized maternal care provided during pregnancy for a defect in the uterine wall at the site of a previous cesarean section incision, commonly known as an isthmocele or cesarean scar defect. This defect can manifest as a pouch or diverticulum in the lower uterine segment, potentially leading to complications during the current pregnancy.

Apply this code when a pregnant patient is receiving antenatal care specifically due to the presence of a cesarean scar defect identified prior to or during the current gestation. Documentation should clearly indicate the diagnosis of an isthmocele and ongoing management or monitoring related to this condition during pregnancy.

• Ensure documentation specifies "maternal care" for the isthmocele, not just the presence of the defect.
• This code is for the maternal care aspect; a separate code for the isthmocele itself (e.g., N85.8) may be used for non-obstetric encounters.
• Sequence this code as a secondary diagnosis when the primary reason for the encounter is routine antenatal care (e.g., Z34.xx).