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

This code signifies maternal care provided due to a suspected or confirmed diagnosis of Trisomy 18 (Edwards Syndrome) in one of multiple fetuses. This condition involves an extra copy of chromosome 18, leading to severe developmental abnormalities. The "other fetus" designation indicates that this code is used when there are multiple gestations, and the chromosomal abnormality is not in the first-listed fetus.

Apply this code when a pregnant patient is receiving medical attention because diagnostic testing (e.g., amniocentesis, CVS, NIPT) or ultrasound findings suggest Trisomy 18 in one of the fetuses in a multiple gestation pregnancy. Documentation should clearly state the suspected or confirmed diagnosis of Trisomy 18 and specify which fetus is affected if applicable.

• Ensure documentation specifies "Trisomy 18" and not a general chromosomal abnormality.
• Verify that the documentation indicates a multiple gestation pregnancy and that the affected fetus is not the primary one.
• Do not use this code for a singleton pregnancy; use the appropriate code for a single fetus.