Mat care chromosomal abnlt in fetus, Trisomy 18, fetus 5

This code signifies maternal care provided due to a suspected diagnosis of Trisomy 18 (Edwards Syndrome) in a specific fetus, identified as fetus 5 in a multiple gestation pregnancy. It indicates that the mother is receiving monitoring or management because of concerns for this severe chromosomal abnormality in one of her fetuses.

Use this code when documentation indicates maternal care for a suspected Trisomy 18 diagnosis in fetus 5, often identified through prenatal screening (e.g., NIPT, quad screen) or diagnostic testing (e.g., amniocentesis, CVS). This applies even if the diagnosis is not yet confirmed but is strongly suspected and influencing maternal management.

• Ensure the medical record clearly specifies "fetus 5" in a multiple gestation pregnancy.
• Distinguish from confirmed chromosomal abnormalities (Q91.3-) which would be coded for the fetus, not the mother's care.
• Always sequence this code as a primary diagnosis when it is the reason for the encounter, followed by any relevant codes for the specific maternal care provided.