Mat care chromosomal abnlt in fetus, Trisomy 18, fetus 3

This code signifies maternal care provided due to a suspected or confirmed diagnosis of Trisomy 18 (Edwards Syndrome) in the third fetus of a multiple gestation pregnancy. Trisomy 18 is a severe chromosomal abnormality characterized by an extra copy of chromosome 18, leading to significant developmental delays and often life-limiting conditions. The maternal care encompasses monitoring, counseling, and management related to this fetal condition.

Use this code when the mother is receiving care because the third fetus in a multifetal pregnancy is suspected or confirmed to have Trisomy 18. This applies to scenarios where diagnostic testing (e.g., amniocentesis, chorionic villus sampling) or screening tests (e.g., NIPT, ultrasound findings) indicate this specific chromosomal anomaly. Documentation should clearly specify the suspected or confirmed Trisomy 18 and identify it as pertaining to the third fetus.

• Ensure the documentation explicitly identifies the affected fetus as "fetus 3" in a multiple gestation.
• Do not use this code for other chromosomal abnormalities; a specific code exists for each.
• Sequence this code as a secondary diagnosis following the primary reason for the encounter, if applicable, or as the primary diagnosis if the maternal care is solely focused on the fetal anomaly.