Mat care chromosomal abnlt in fetus, Trisomy 18, fetus 2

This code signifies maternal care provided due to a suspected or confirmed diagnosis of Trisomy 18 (Edwards Syndrome) in the second fetus of a multiple gestation pregnancy. It indicates that the mother is receiving specialized monitoring and management because of this specific chromosomal anomaly detected in one of the fetuses.

Apply this code when documentation confirms maternal care for a fetus diagnosed with or highly suspected of having Trisomy 18, specifically when it is the second identified fetus in a multifetal pregnancy. This would typically follow abnormal prenatal screening results (e.g., NIPT, quad screen) or diagnostic testing (e.g., amniocentesis, CVS) indicating Trisomy 18.

• Ensure the documentation clearly specifies "fetus 2" in a multiple gestation.
• Do not use this code for Trisomy 18 in a singleton pregnancy or for other chromosomal abnormalities.
• Sequence this code as a secondary diagnosis following the appropriate code for the maternal condition or reason for encounter.