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

O35

Maternal care for known or suspected fetal abnormality and damage

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
O35.0Maternal care for (suspected) central nervous system malformation in fetusCategory
O35.00Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecifiedCategory
O35.00X0Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecified, not applicable or unspecifiedBillable
O35.00X1Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecified, fetus 1Billable
O35.00X2Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecified, fetus 2Billable
O35.00X3Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecified, fetus 3Billable
O35.00X4Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecified, fetus 4Billable
O35.00X5Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecified, fetus 5Billable
O35.00X9Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecified, other fetusBillable
O35.01Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosumCategory
O35.01X0Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosum, not applicable or unspecifiedBillable
O35.01X1Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosum, fetus 1Billable
O35.01X2Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosum, fetus 2Billable
O35.01X3Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosum, fetus 3Billable
O35.01X4Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosum, fetus 4Billable
O35.01X5Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosum, fetus 5Billable
O35.01X9Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosum, other fetusBillable
O35.02Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephalyCategory
O35.02X0Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephaly, not applicable or unspecifiedBillable
O35.02X1Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephaly, fetus 1Billable
O35.02X2Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephaly, fetus 2Billable
O35.02X3Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephaly, fetus 3Billable
O35.02X4Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephaly, fetus 4Billable
O35.02X5Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephaly, fetus 5Billable
O35.02X9Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephaly, other fetusBillable
O35.03Maternal care for (suspected) central nervous system malformation or damage in fetus, choroid plexus cystsCategory
O35.03X0Maternal care for (suspected) central nervous system malformation or damage in fetus, choroid plexus cysts, not applicable or unspecifiedBillable
O35.03X1Maternal care for (suspected) central nervous system malformation or damage in fetus, choroid plexus cysts, fetus 1Billable
O35.03X2Maternal care for (suspected) central nervous system malformation or damage in fetus, choroid plexus cysts, fetus 2Billable
O35.03X3Maternal care for (suspected) central nervous system malformation or damage in fetus, choroid plexus cysts, fetus 3Billable

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.