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O34.0 ICD-10-CM Code: Maternal care for congenital malformation of uterus

Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.

Coding at a Glance

Tabular directives
3 inclusion terms · 1 use-additional code · 1 code-first instruction

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for O34.0 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2027Effective: October 1, 2026

Trace:FY2027 changesChange historyRelease, file and checksum

Notes without a marker are published on O34.0 itself; “inherited from” names the category or block whose note applies here.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • the listed conditions as a reason for hospitalization or other obstetric care of the mother, or for cesarean delivery before onset of labor

Source: inherited from O34

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Maternal care for double uterus
  • Maternal care for uterus bicornis

Code First

Underlying conditions that must be sequenced before this code.

  • any associated obstructed labor (O65.5)

Source: inherited from O34

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code for specific condition

Source: inherited from O34

Coder workflow for O34.0

MedCoder structured workflow — derived from this code’s own official record

Before you code O34.0

  1. O34.0 is not reportable as written. Select the more specific code beneath it that the documentation supports. Codes are reported to the highest level of specificity the classification provides (Guidelines I.B.2).

    ReviewO34.00, O34.01, O34.02, O34.03

    See the relationships section · Guide: How to choose an ICD-10-CM code →

  2. Confirm the condition is documented as complicating the pregnancy, childbirth, or the puerperium, and check the trimester where the code carries one and the fetus character where the category requires it. Chapter 15 codes belong on the maternal record only and take sequencing priority over codes from other chapters. It is the provider’s responsibility to state that a condition is not affecting the pregnancy; the trimester is assigned from the documentation (Guidelines I.C.15.a, I.C.15.a.1, I.C.15.a.3).

    Guide: How to choose an ICD-10-CM code →

Choose the right path

  1. Does the documentation support one of the more specific codes beneath O34.0?
    Yes → Select that code and continue the checks below on its own page.
    No → O34.0 cannot be reported as written; query for the specificity its subcategory needs.

    ReviewO34.00, O34.01, O34.02, O34.03

  2. Is the underlying (etiologic) condition the Code First note names documented?
    Yes → Sequence the underlying condition first, then O34.0.
    No → Continue; do not add an underlying condition the record does not document.

    ReviewO65.5

Consider O34.0. Then work the Use Additional Code note, and confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
Trimester
Assigned from the documented trimester at the encounter, or the trimester in which the condition developed for inpatient stays (Guidelines I.C.15.a.3).
The underlying (etiologic) condition
Named in the Code First note; sequenced before this code when documented (Guidelines I.A.13).
The conditions the Use Additional Code note names
Reported with this code when documented; a conditional instruction (“if applicable”, “if known”) applies only when the record supports it.

Official instructions as workflow

  • Code First — sequencing check(1 note)

    Coding workflow: Check whether the underlying or etiologic condition the note names is documented. When it is, sequence it before O34.0. Do not add an underlying condition the record does not document.

    ReviewO65.5

    See the official tabular notes · Guidelines I.A.13

  • Use Additional Code — after identifying O34.0(1 note)

    Coding workflow: Check whether the documentation supports the additional code(s) the note names, and report them with O34.0 when it does. Where the instruction is conditional (“if applicable”, “if known”), it applies only when the record documents the condition.

    See the official tabular notes · Guidelines I.A.13

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: The underlying condition the Code First note names is documented alongside this condition.

Coding question: How are the two sequenced?

Path: Review the Code First note.

Reason: The underlying condition is sequenced first and the manifestation follows (Guidelines I.A.13).

ReviewO65.5

Documentation: A condition the Use Additional Code note names is documented.

Coding question: Is a second code reported with O34.0?

Path: Review the Use Additional Code note and the code it names.

Reason: The additional code is reported when the record documents the condition; a conditional instruction applies only when its condition is met (Guidelines I.A.13).

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Code Overview

Maternal care for congenital malformation of uterus is a non-billable ICD-10-CM category code (O34.0). A more specific billable subcode must be selected for claims submission.

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Verify Before Coding

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

Other codes that name O34.0 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 11 Excludes2 notes: O20 — Hemorrhage in early pregnancy (via O34.-), O20-O29 — Other maternal disorders predominantly related to pregnancy (O20-O29) (via O34.-), O21 — Excessive vomiting in pregnancy (via O34.-), O22 — Venous complications and hemorrhoids in pregnancy (via O34.-), O23 — Infections of genitourinary tract in pregnancy (via O34.-), O24 — Diabetes mellitus in pregnancy, childbirth, and the puerperium (via O34.-), O25 — Malnutrition in pregnancy, childbirth and the puerperium (via O34.-), O26 — Maternal care for other conditions predominantly related to pregnancy (via O34.-), O28 — Abnormal findings on antenatal screening of mother (via O34.-), O29 — Complications of anesthesia during pregnancy (via O34.-), O99.8 — Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium (via O34.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

Related Codes

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main term “Double”; these codes share that main term but sit in a different category of the Tabular List.

E88.09 — Other disorders of plasma-protein metabolism, not elsewhere classified (albumin), H53.2 — Diplopia (vision), O65.5 — Obstructed labor due to abnormality of maternal pelvic organs (uterus, in pregnancy or childbirth, causing obstructed labor), Q17.8 — Other specified congenital malformations of ear (auditory canal), Q20.1 — Double outlet right ventricle (outlet, right ventricle), Q20.2 — Double outlet left ventricle (outlet, left ventricle), Q20.4 — Double inlet ventricle (inlet ventricle), Q20.8 — Other congenital malformations of cardiac chambers and connections (auricle), Q25.45 — Double aortic arch (aortic arch), Q38.3 — Other congenital malformations of tongue (tongue), Q51.10 — Doubling of uterus with doubling of cervix and vagina without obstruction (vagina, with doubling of uterus), Q51.11 — Doubling of uterus with doubling of cervix and vagina with obstruction (cervix, with doubling of uterus, with obstruction), Q51.21 — Complete doubling of uterus (uterus, complete), Q51.22 — Partial doubling of uterus (uterus, partial), Q51.28 — Other and unspecified doubling of uterus (uterus), Q51.820 — Cervical duplication (cervix), Q52.10 — Doubling of vagina, unspecified (vagina), Q52.79 — Other congenital malformations of vulva (vulva), Q62.5 — Duplication of ureter (ureter), Q63.0 — Accessory kidney (kidney with double pelvis), +4 more

Contextual Map

Every relationship of O34.0 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run O34.0 with these 8 related codes in Claim Check

Hierarchy

Referenced by Excludes2 notes (11)

Nearest codes (40)

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Common coding questions

Can O34.0 be billed directly?

No. O34.0 (Maternal care for congenital malformation of uterus) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v44.0 (October 2026) Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder structured relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "O34.0 — Maternal care for congenital malformation of uterus." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/o34.0-maternal-care-for-congenital-malformation-of-uterus

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Maternal care for congenital malformation of uterus

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027, and none are recorded for this code. Note changes are tracked from FY2027 only.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to O34.0 in its code family, with their registry titles.

View all codes in the O34 family