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    v1.0.28
    OpenPayerBilling CodesMaternal care related to the fetus and amniotic cavity and possible delivery problemsICD-10-CM o35-maternal-care-for-fetal-abnormality
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    ICD-10-CM Code For Maternal Care For Known Or Suspected Fetal Abnormality And Damage: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group O35 includes maternal encounters for known or suspected fetal abnormalities and fetal damage, such as chromosomal anomalies, congenital malformations, and fetal injury. These ICD-10-CM diagnosis codes are used to document prenatal findings, fetal conditions influencing pregnancy management, and maternal care related to fetal complications, capturing disease severity, organ involvement, or clinical complexity relevant to this group. Accurate coding within the ICD-10-CM O35 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM O35: Maternal Care For Known Or Suspected Fetal Abnormality And Damage Overview

    The diagnoses in this group represent maternal encounters for known or suspected fetal abnormality or damage, focusing on conditions affecting the fetus and potential impacts on pregnancy management. These codes target disorders of the fetus, amniotic cavity, and issues that may complicate delivery or prenatal care. Accurate coding matters for complete clinical documentation and supports correct claim processing and reimbursement.

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    When to Use

    Use codes from this group when a pregnancy encounter is specifically for evaluation, monitoring, or management of a known or suspected fetal abnormality or fetal damage identified prenatally. Apply the most specific code reflecting the type of fetal abnormality, associated complications, and any maternal-fetal management circumstances.

    ICD-10-CM Codes

    231 rows

    ICD-10-CM CodeDescription
    O35.00X0Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecified, not applicable or unspecified
    O35.00X1Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecified, fetus 1
    O35.00X2Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecified, fetus 2
    O35.00X3Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecified, fetus 3
    O35.00X4Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecified, fetus 4
    O35.00X5Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecified, fetus 5
    O35.00X9Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecified, other fetus
    O35.01X0Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosum, not applicable or unspecified
    O35.01X1Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosum, fetus 1
    O35.01X2Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosum, fetus 2
    O35.01X3Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosum, fetus 3
    O35.01X4Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosum, fetus 4
    O35.01X5Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosum, fetus 5
    O35.01X9Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosum, other fetus
    O35.02X0Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephaly, not applicable or unspecified
    O35.02X1Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephaly, fetus 1
    O35.02X2Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephaly, fetus 2
    O35.02X3Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephaly, fetus 3
    O35.02X4Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephaly, fetus 4
    O35.02X5Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephaly, fetus 5

    Showing 1–20 of 231

    • More pages

    DRG Codes

    6 rows

    DRG CodeDescription
    817Other Antepartum Diagnoses with O.R. Procedures with MCC
    818Other Antepartum Diagnoses with O.R. Procedures with CC
    819Other Antepartum Diagnoses with O.R. Procedures without CC/MCC
    831Other Antepartum Diagnoses without O.R. Procedures with MCC
    832Other Antepartum Diagnoses without O.R. Procedures with CC
    833Other Antepartum Diagnoses without O.R. Procedures without CC/MCC

    Typical Clinical Scenarios

    • A pregnant woman in her second trimester is referred to maternal-fetal medicine after an ultrasound detects a fetal neural tube defect (open spina bifida) with concern for worsening ventriculomegaly. The patient presents for counseling and serial imaging to monitor progression and plan potential in utero or postnatal interventions; a maternal-fetal diagnosis code from this group is assigned to indicate maternal care related to a known fetal structural abnormality. Typical codes: O35.01X0, O35.01X1
    • A woman at 32 weeks’ gestation with a history of gestational diabetes is admitted emergently because prenatal imaging suggests fetal growth restriction and possible placental insufficiency, raising concern for fetal compromise. She receives continuous fetal monitoring, Doppler studies, and consideration of urgent delivery; a code from this group is used to document maternal care provided for a suspected fetal abnormality affecting fetal status. Typical codes: O35.02X0, O35.02X1
    • A patient with a previously identified chromosomal abnormality in the fetus (e.g., trisomy confirmed by amniocentesis) presents for serial prenatal visits to discuss prognosis, recurrence risk, and delivery planning; maternal surveillance is ongoing without acute decompensation. A code in this group is recorded to indicate maternal care related to the known fetal genetic abnormality as part of routine pregnancy management. Typical codes: O35.03X0, O35.03X1

    Related Codes

    O30-MULTIPLE-GESTATION-PREGNANCY

    ICD-10-CM Code For Multiple Gestation: Group Overview

    O31-COMPLICATIONS-SPECIFIC-TO-MULTIPLE-GESTATION

    ICD-10-CM Code For Complications Specific To Multiple Gestation: Group Overview

    O32-MALPRESENTATION-OF-FETUS

    ICD-10-CM Code For Maternal Care For Malpresentation Of Fetus: Group Overview

    O33-MATERNAL-CARE-FOR-DISPROPORTION

    ICD-10-CM Code For Maternal Care For Disproportion: Group Overview

    O34-ABNORMALITY-OF-PELVIC-ORGANS

    ICD-10-CM Code For Maternal Care For Abnormality Of Pelvic Organs: Group Overview

    O36-MATERNAL-CARE-OTHER-FETAL-PROBLEMS

    ICD-10-CM Code For Maternal Care For Other Fetal Problems: Group Overview

    O40-POLYHYDRAMNIOS

    ICD-10-CM Code For Polyhydramnios: Group Overview

    O41-OTHER-DISORDERS-OF-AMNIOTIC-FLUID

    ICD-10-CM Code For Other Disorders Of Amniotic Fluid And Membranes: Group Overview

    O42-PREMATURE-RUPTURE-OF-MEMBRANES

    ICD-10-CM Code For Premature Rupture Of Membranes: Group Overview

    O43-PLACENTAL-DISORDERS

    ICD-10-CM Code For Placental Disorders: Group Overview

    Showing 1–10 of 15

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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