O35.12X9: Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, other fetus
O35.12X9 is the billable ICD-10-CM diagnosis code for Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, other fetus. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code O35.12X9?
O35.12X9 is the ICD-10-CM diagnosis code for Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, other fetus. It belongs to category O35 (Maternal care for known or suspected fetal abnormality and damage).
Is O35.12X9 a billable code?
Yes. O35.12X9 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does O35.12X9 belong to?
O35.12X9 is part of ICD-10-CM category O35 — Maternal care for known or suspected fetal abnormality and damage, which has 462 billable codes.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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