O35.12X1
✓ Billable
Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, fetus 1
ICD-10-CM · FY2026 · Pregnancy, Childbirth and the Puerperium
Code
O35.12X1
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Pregnancy, Childbirth and the Puerperium
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code O35.12X1?
ICD-10-CM code O35.12X1 represents Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, fetus 1. It is a billable diagnosis code in the Pregnancy, Childbirth and the Puerperium chapter, effective October 1, 2025 – September 30, 2026.
Is O35.12X1 billable?
Yes. O35.12X1 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is O35.12X1 in?
O35.12X1 belongs to the Pregnancy, Childbirth and the Puerperium chapter (O00–O9A) of ICD-10-CM.
Related codes in the O35 category
O35
Maternal care for known or suspected fetal abnormality and damage
Non-billable
O35.0
Maternal care for (suspected) central nervous system malformation in fetus
Non-billable
O35.1
Maternal care for (suspected) chromosomal abnormality in fetus
Non-billable
O35.A
Maternal care for other (suspected) fetal abnormality and damage, fetal facial anomalies
Non-billable
O35.B
Maternal care for other (suspected) fetal abnormality and damage, fetal cardiac anomalies
Non-billable
O35.C
Maternal care for other (suspected) fetal abnormality and damage, fetal pulmonary anomalies
Non-billable
O35.D
Maternal care for other (suspected) fetal abnormality and damage, fetal gastrointestinal anomalies
Non-billable
O35.E
Maternal care for other (suspected) fetal abnormality and damage, fetal genitourinary anomalies
Non-billable
Search all 98,186 ICD-10-CM codes instantly
Search ICDwise →