2026 ICD-10-CM Diagnosis Code Q20.0Common arterial trunk

ICD-10-CM Codes›Q00-Q99›Q20-Q28›Q20

ICD-10-CM Q20.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q20.0 is a billable ICD-10-CM diagnosis code for common arterial trunk. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 306 through 307. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cardiac and circulatory congenital anomalies.

Code Identity

ICD-10-CM Code
Q20.0
Billable Status
Yes — Valid for Submission
Code Describes
Common arterial trunk
Short Description
Common arterial trunk
Same as the full description in the CMS dataset.
Parent Code
Q20
Congenital malformations of cardiac chambers and connections

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ20-Q28Congenital malformations of the circulatory system
CategoryQ20Congenital malformations of cardiac chambers and connections
This CodeQ20.0Common arterial trunk

Present on Admission (POA)Billing

Q20.0 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormality of truncal valve cusp
  • Accessory tissue on truncal valve cusp
  • Common arterial trunk
  • Common arterial trunk and common origin of pulmonary arteries
  • Common arterial trunk and separate origin of pulmonary arteries
  • Common arterial trunk and widely separate origin of pulmonary arteries
  • Common arterial trunk with aortic dominance
  • Common arterial trunk with crossed over pulmonary arteries
  • Common arterial trunk with isolated pulmonary artery
  • Common arterial trunk with obstruction of aortic arch
  • Common arterial trunk with pulmonary arteries arising from trunk and unobstructed aortic arch
  • Common arterial trunk with pulmonary dominance
  • Common arterial trunk with pulmonary dominance and aortic coarctation
  • Common arterial trunk with pulmonary dominance and interrupted aortic arch
  • Common arterial trunk with pulmonary origin from truncal valve sinus
  • Congenital abnormality of truncal valve
  • Congenital absence of pulmonary trunk
  • Congenital malposition of pulmonary artery
  • Interrupted aortic arch
  • Obstruction of aortic arch
  • Solitary arterial trunk
  • Solitary pulmonary trunk with aortic atresia
  • Truncus arteriosus, Edwards' type IV

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Persistent truncus arteriosus

Type 1 Excludes

  • aortic septal defect Q21.4

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Common
      • arterial trunk
    • Common
      • truncus (arteriosus)
    • Malposition
      • congenital
        • arterial trunk
    • Persistence, persistent(congenital)
      • truncus arteriosus or communis
    • Truncus
      • arteriosus (persistent)
    • Truncus
      • communis

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MAL001
Cardiac and circulatory congenital anomalies
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Interrupted Aortic Arch

    a rare congenital cardiovascular disorder characterized by the presence of a gap between the ascending and descending portions of the thoracic aorta. this disorder is often associated with ventricular septal defect, ductus arteriosus, or truncus arteriosus.

Patient EducationClinical

Congenital Heart Defects

Congenital heart defects (CHDs) are problems with the structure of the heart. "Congenital" means that that the problems are present at birth. These defects happen when a fetus's heart doesn't develop normally during pregnancy. Congenital heart defects are the most common type of birth defect.

The full article covers:

  • What are congenital heart defects?
  • What causes congenital heart defects?
  • Who is more likely to have a baby with a congenital heart defect?
  • What are the symptoms of congenital heart defects?
  • What other problems do congenital heart defects cause?
  • How are congenital heart defects diagnosed?
  • What are the treatments for congenital heart defects?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert Q20.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
745.0 Common truncus
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Q20.0Overview

Is Q20.0 (Congenital malformations of cardiac chambers and connections) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report common arterial trunk on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does Q20.0 group to?

When common arterial trunk is the principal diagnosis on an inpatient stay, it groups to MS-DRG 306, 307, with relative weights from 0.9132 to 1.5758 depending on complications. Higher weights mean higher Medicare reimbursement.

Is Q20.0 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for common arterial trunk on inpatient claims.

What is the ICD-9 equivalent of Q20.0?

Under the General Equivalence Mappings, common arterial trunk converts to ICD-9-CM 745.0 (common truncus). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.