Mat care chromosomal abnlt in fetus, Trisomy 21, fetus 2

This code indicates maternal care provided due to a suspected or confirmed diagnosis of Trisomy 21 (Down syndrome) in the second fetus of a multiple gestation pregnancy. It signifies that the mother is receiving specialized monitoring and management because of this specific fetal chromosomal abnormality.

Use this code when documentation clearly states maternal care is being provided for a fetus diagnosed with or highly suspected of having Trisomy 21, and it is specifically identified as the second fetus. This applies to scenarios such as abnormal prenatal screening results, diagnostic amniocentesis, or chorionic villus sampling confirming Trisomy 21 in fetus 2.

• Ensure the documentation specifies "fetus 2" for the Trisomy 21 diagnosis.
• Do not use this code if the chromosomal abnormality is not Trisomy 21 or if the affected fetus is not clearly identified as the second.
• Sequence this code as a secondary diagnosis following the primary code for the encounter (e.g., routine prenatal visit).