Maternal care for transverse and oblique lie, fetus 1

This code signifies a pregnancy where the fetus is positioned horizontally (transverse lie) or diagonally (oblique lie) within the uterus, rather than the typical head-down (cephalic) or breech presentation. This abnormal fetal presentation can complicate vaginal delivery and often necessitates a Cesarean section.

Apply this code when documentation confirms a transverse or oblique fetal lie for the first fetus in a multiple gestation, or for a singleton pregnancy. This diagnosis is typically made via ultrasound or physical examination during the third trimester or at the onset of labor.

• Ensure documentation specifies "fetus 1" if a multiple gestation is present; otherwise, it defaults to a singleton pregnancy.
• Distinguish carefully between transverse/oblique lie and other malpresentations like breech (O32.1XX-).
• This code is for maternal care due to the malpresentation; additional codes may be needed for any interventions performed.