Mat care chromosomal abnlt in fetus, Trisomy 18, fetus 4

This code signifies maternal care provided due to a suspected chromosomal abnormality in the fetus, specifically Trisomy 18 (Edwards Syndrome), affecting the fourth fetus in a multiple gestation pregnancy. It indicates that the mother is receiving monitoring or intervention because of this fetal genetic concern.

Apply this code when documentation confirms maternal care for a fetus suspected of having Trisomy 18. This typically involves prenatal diagnostic testing (e.g., amniocentesis, CVS, NIPT) results or ultrasound findings suggestive of the condition in the fourth fetus of a multifetal pregnancy. The medical record must clearly identify the specific fetus affected.

• Always specify the fetus number (1-5+) when coding for multifetal gestations.
• Ensure documentation supports "suspected" or "confirmed" Trisomy 18; if confirmed, a more specific code might be available for the fetal condition itself.
• Sequence this code as a secondary diagnosis, with the primary diagnosis typically being the reason for the encounter (e.g., routine prenatal visit, high-risk pregnancy management).