Mat care chromsoml abnlt in fts, other chromsoml abnlt, fts3

This code signifies ongoing maternal care due to a suspected or confirmed chromosomal abnormality in the fetus, specifically when the abnormality is identified as something other than trisomy 13, 18, or 21, and the pregnancy is in the third trimester. It indicates that the mother is receiving specialized management because of this fetal genetic concern.

Use this code when documentation confirms maternal care for a fetus with a suspected or diagnosed "other" chromosomal abnormality (e.g., Turner syndrome, Klinefelter syndrome, deletions, duplications not specified as common trisomies) during the third trimester of pregnancy. Supporting documentation would include genetic counseling reports, amniocentesis results, chorionic villus sampling (CVS) results, or detailed ultrasound findings indicating a chromosomal anomaly.

• Ensure the documentation clearly specifies an "other" chromosomal abnormality, not trisomy 13, 18, or 21, and that the pregnancy is in the third trimester.
• Do not use this code for suspected or confirmed trisomy 13, 18, or 21; specific codes exist for those conditions.
• Always sequence this code as a secondary diagnosis, with a code from category Z3A (weeks of gestation) as a primary or co-primary diagnosis, if applicable and supported.