ICD10
ICD-10 Code O35.0: Maternal care for (suspected) central nervous system malformation in fetus
O35.0 is an ICD-10 diagnosis entry used to group records related to Maternal care for (suspected) central nervous system malformation in fetus. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Pregnancy, childbirth and the puerperium (O00-O9A).
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Pregnancy, childbirth and the puerperium (O00-O9A).
When is it used?
- May be used when a clinician documents maternal care for (suspected) central nervous system malformation in fetus in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
Code hierarchy
chapter
15Pregnancy, childbirth and the puerperium (O00-O9A)
block
O30-O48Maternal care related to the fetus and amniotic cavity and possible delivery problems
category
O35Maternal care for known or suspected fetal abnormality and damage
currentO35
Official coding notes
Excludes2 (may code together if documented)
- chromosomal abnormality in fetus (O35.1-)
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
ObstetricianGynecologist
Related codes
O35.00Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecifiedcodeO35.01Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosumcodeO35.02Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephalycodeO35.03Maternal care for (suspected) central nervous system malformation or damage in fetus, choroid plexus cystscodeO35.04Maternal care for (suspected) central nervous system malformation or damage in fetus, encephalocelecodeO35.05Maternal care for (suspected) central nervous system malformation or damage in fetus, holoprosencephalycodeO35.06Maternal care for (suspected) central nervous system malformation or damage in fetus, hydrocephalycodeO35.07Maternal care for (suspected) central nervous system malformation or damage in fetus, microcephalycodeO35.08Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifidacodeO35.09Maternal care for (suspected) other central nervous system malformation or damage in fetuscode
Sibling codes
O35.1Maternal care for (suspected) chromosomal abnormality in fetusO35.AMaternal care for other (suspected) fetal abnormality and damage, fetal facial anomaliesbillableO35.BMaternal care for other (suspected) fetal abnormality and damage, fetal cardiac anomaliesbillableO35.CMaternal care for other (suspected) fetal abnormality and damage, fetal pulmonary anomaliesbillableO35.DMaternal care for other (suspected) fetal abnormality and damage, fetal gastrointestinal anomaliesbillableO35.EMaternal care for other (suspected) fetal abnormality and damage, fetal genitourinary anomaliesbillableO35.FMaternal care for other (suspected) fetal abnormality and damage, fetal musculoskeletal anomalies of trunkbillableO35.GMaternal care for other (suspected) fetal abnormality and damage, fetal upper extremities anomaliesbillableO35.HMaternal care for other (suspected) fetal abnormality and damage, fetal lower extremities anomaliesbillableO35.2Maternal care for (suspected) hereditary disease in fetusbillableO35.3Maternal care for (suspected) damage to fetus from viral disease in motherbillableO35.4Maternal care for (suspected) damage to fetus from alcoholbillableO35.5Maternal care for (suspected) damage to fetus by drugsbillableO35.6Maternal care for (suspected) damage to fetus by radiationbillableO35.7Maternal care for (suspected) damage to fetus by other medical proceduresbillableO35.8Maternal care for other (suspected) fetal abnormality and damagebillableO35.9Maternal care for (suspected) fetal abnormality and damage, unspecifiedbillable
Mapped diagnoses and classifications
SNOMED_CT 609416008high
Fetal anencephaly suspected
Source: SNOMED International ICD-10 map
SNOMED_CT 237153007high
Fetal hydrocephalus suspected
Source: SNOMED International ICD-10 map
SNOMED_CT 1538006high
Fetal malformation of central nervous system affecting obstetrical care
Source: SNOMED International ICD-10 map
SNOMED_CT 237152002high
Fetal spina bifida suspected
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
O35.0
Replacement codes
O35.00 — Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecifiedO35.01 — Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosumO35.02 — Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephalyO35.03 — Maternal care for (suspected) central nervous system malformation or damage in fetus, choroid plexus cystsO35.04 — Maternal care for (suspected) central nervous system malformation or damage in fetus, encephaloceleO35.05 — Maternal care for (suspected) central nervous system malformation or damage in fetus, holoprosencephalyO35.06 — Maternal care for (suspected) central nervous system malformation or damage in fetus, hydrocephalyO35.07 — Maternal care for (suspected) central nervous system malformation or damage in fetus, microcephalyO35.08 — Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifidaO35.09 — Maternal care for (suspected) other central nervous system malformation or damage in fetus
Common synonyms
Maternal care for (suspected) central nervous system malformation in fetusMaternal care forMaternal care for suspected central nervous system malformation in fetus
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.