Mat care chromosomal abnlt in fetus, Trisomy 13, fetus 4

This code signifies maternal care provided due to a suspected or confirmed diagnosis of Trisomy 13 (Patau syndrome) in the fourth fetus of a multiple gestation pregnancy. Trisomy 13 is a severe chromosomal disorder characterized by the presence of an extra copy of chromosome 13, leading to significant congenital anomalies and often poor prognosis.

Use this code when a pregnant patient is receiving medical attention because one of her fetuses, specifically the fourth, has been identified with or is suspected of having Trisomy 13. Documentation should clearly indicate the chromosomal abnormality, the specific fetus affected (e.g., "fetus D" or "fourth fetus"), and the ongoing maternal care related to this condition.

• Always ensure the documentation specifies which fetus is affected in a multiple gestation pregnancy.
• This code is for maternal care; do not use it for the fetal condition itself (which would be coded from Chapter 16).
• Sequence this code as a primary diagnosis when the maternal care is primarily focused on the fetal chromosomal abnormality.