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ICD-10 Code O35.1: Maternal care for (suspected) chromosomal abnormality in fetus

O35.1 is an ICD-10 diagnosis entry used to group records related to Maternal care for (suspected) chromosomal abnormality 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) chromosomal abnormality 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

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

Sibling codes

O35.0Maternal care for (suspected) central nervous system malformation 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

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
O35.1
Replacement codes
O35.10 — Maternal care for (suspected) chromosomal abnormality in fetus, unspecifiedO35.11 — Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13O35.12 — Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18O35.13 — Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21O35.14 — Maternal care for (suspected) chromosomal abnormality in fetus, Turner SyndromeO35.15 — Maternal care for (suspected) chromosomal abnormality in fetus, sex chromosome abnormalityO35.19 — Maternal care for (suspected) chromosomal abnormality in fetus, other chromosomal abnormality

Common synonyms

Maternal care for (suspected) chromosomal abnormality in fetusMaternal care forMaternal care for suspected chromosomal abnormality in fetus

Frequently asked questions

Code details

CodeO35.1
SystemICD10
Display nameMaternal care for (suspected) chromosomal abnormality in fetus
ChapterPregnancy, childbirth and the puerperium (O00-O9A)
BlockMaternal care related to the fetus and amniotic cavity and possible delivery problems

Flags

BillableNo
Valid clinical useNo

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

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.

ICD-10 Code O35.1 for Maternal care for (suspected) chromosomal abnormality in fetus | HealthAssure