Back to ICD-10 library
ICD-10-CM · FY 2026 APRIL UPDATE

O35.1

Maternal care for (suspected) chromosomal abnormality in fetus

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
O35.10Maternal care for (suspected) chromosomal abnormality in fetus, unspecifiedCategory
O35.10X0Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, not applicable or unspecifiedBillable
O35.10X1Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, fetus 1Billable
O35.10X2Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, fetus 2Billable
O35.10X3Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, fetus 3Billable
O35.10X4Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, fetus 4Billable
O35.10X5Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, fetus 5Billable
O35.10X9Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, other fetusBillable
O35.11Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13Category
O35.11X0Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13, not applicable or unspecifiedBillable
O35.11X1Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13, fetus 1Billable
O35.11X2Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13, fetus 2Billable
O35.11X3Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13, fetus 3Billable
O35.11X4Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13, fetus 4Billable
O35.11X5Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13, fetus 5Billable
O35.11X9Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13, other fetusBillable
O35.12Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18Category
O35.12X0Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, not applicable or unspecifiedBillable
O35.12X1Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, fetus 1Billable
O35.12X2Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, fetus 2Billable
O35.12X3Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, fetus 3Billable
O35.12X4Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, fetus 4Billable
O35.12X5Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, fetus 5Billable
O35.12X9Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, other fetusBillable
O35.13Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21Category
O35.13X0Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21, not applicable or unspecifiedBillable
O35.13X1Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21, fetus 1Billable
O35.13X2Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21, fetus 2Billable
O35.13X3Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21, fetus 3Billable
O35.13X4Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21, fetus 4Billable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.