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Q25.2 ICD-10-CM Code: Atresia of aorta

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Billing Status: NO. This is a non-billable ICD-10-CM code: report a more specific billable code beneath it.

Not billable · FY2027A non-billable heading in the tabular list: report a more specific code beneath it.

What you need to know

Source: CMS/NCHS Official ICD-10-CM tabular notes, quoted. From the CMS/NCHS tabular list for the release in force. A note the category or block publishes applies to this code too; the Instructions section marks which is which.

The tabular list publishes no instructional note for this code itself.

CompareCheck ClaimView Related Codes

Coder workflow for Q25.2

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

Before you code Q25.2

  1. Q25.2 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).

    ReviewQ25.21, Q25.29

    See the relationships section · 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 Q25.2?
    Yes → Select that code and continue the checks below on its own page.
    No → Q25.2 cannot be reported as written; query for the specificity its subcategory needs.

    ReviewQ25.21, Q25.29

Consider Q25.2. Then 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).

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.

Don’t confuse Q25.2 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of Q25.2 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

  • Q25.9— Specificity relationship (Review)

    Overlapping diagnoses in the same category.

    Overlapping codes in the same category — the documentation decides which is the more specific fit.

    What moves you there: A record that documents no more than “Congenital malformation of great arteries, unspecified” takes Q25.9; specificity in the record moves it back here.

    Full comparison: Q25.2 vs Q25.9 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Coding context

Guidelines, coding notes, decision aids, relationships (with MS-DRG and CCSR classification), hierarchy, HCC, coverage and the context map: what a coder reaches for after the core. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.

Code Overview

Atresia of aorta is a non-billable ICD-10-CM category code (Q25.2). 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

  • Not billable as written — a more specific code is required: Q25.21, Q25.29.

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-derived relationships — computed from published CMS and AHRQ datasets

Other codes that name Q25.2 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 1 Excludes2 note: P29 — Cardiovascular disorders originating in the perinatal period (via Q25.-).

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

Referenced by 2 Code Also instructions across 2 chapters: I27.21 — Secondary pulmonary arterial hypertension (via Q25.-), Z71.87 — Encounter for pediatric-to-adult transition counseling (via Q25.-).

These codes suggest coding this condition alongside when both are present.

Clinical classification (AHRQ CCSR):MAL001 — Cardiac and circulatory congenital anomalies (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Cardiac and circulatory congenital anomalies).

Q24.1 — Levocardia, Q24.2 — Cor triatriatum, Q24.3 — Pulmonary infundibular stenosis, Q24.4 — Congenital subaortic stenosis, Q24.5 — Malformation of coronary vessels, Q24.6 — Congenital heart block, Q24.8 — Other specified congenital malformations of heart, Q24.9 — Congenital malformation of heart, unspecified, Q25.0 — Patent ductus arteriosus, Q25.1 — Coarctation of aorta, Q25.21 — Interruption of aortic arch, Q25.29 — Other atresia of aorta, Q25.3 — Supravalvular aortic stenosis, Q25.4 — Other congenital malformations of aorta, Q25.40 — Congenital malformation of aorta unspecified, Q25.41 — Absence and aplasia of aorta, Q25.42 — Hypoplasia of aorta, Q25.43 — Congenital aneurysm of aorta, Q25.44 — Congenital dilation of aorta, Q25.45 — Double aortic arch, +87 more

Contextual Map

Every relationship of Q25.2 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 Q25.2 with these 3 related codes in Claim Check

Hierarchy

Referenced by Excludes2 notes

Referenced by Code Also instructions

Clinical classification (CCSR)

Nearest codes (25)

Change history (2)

Reference

Index terms and tables, published questions and FAQ, every source behind this page with its release and checksum, the date-of-service check and the complete change history.

Common coding questions

MedCoder editorial

Can Q25.2 be billed directly?

No. Q25.2 (Atresia of aorta) 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-derived 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 editorial 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.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 20, 2026 · All releases and sources

Labels on this page: Official source data · MedCoder-derived relationship · MedCoder editorial explanation. How to read the labels · All data sources and release dates · CMS coding rules

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. "Q25.2 — Atresia of aorta." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/q25.2-atresia-of-aorta

Change history

  • FY2017 — October 1, 2016
    Became a non-billable header
    FY2017 changes
  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Atresia of aorta

Nearest Codes in This Family

Official ICD-10-CM classifications closest to Q25.2 in its code family, with their registry titles.

View all codes in the Q25 family