2026 ICD-10-CM Diagnosis Code Q20.1Double outlet right ventricle

ICD-10-CM Codes›Q00-Q99›Q20-Q28›Q20

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

Q20.1 is a billable ICD-10-CM diagnosis code for double outlet right ventricle. 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
Q20.1
Billable Status
Yes — Valid for Submission
Code Describes
Double outlet right ventricle
Short Description
Double outlet right ventricle
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 CodeQ20.1Double outlet right ventricle

Present on Admission (POA)Billing

Q20.1 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.

  • Double outlet right ventricle
  • Double outlet right ventricle with doubly committed ventricular septal defect
  • Double outlet right ventricle with doubly committed ventricular septal defect and pulmonary stenosis
  • Double outlet right ventricle with intact ventricular septum
  • Double outlet right ventricle with noncommitted ventricular septal defect
  • Double outlet right ventricle with subaortic or doubly committed ventricular septal defect and pulmonary stenosis Fallot type
  • Double outlet right ventricle with subaortic or doubly committed ventricular septal defect without pulmonary stenosis - ventricular septal defect type
  • Double outlet right ventricle with subaortic ventricular septal defect
  • Double outlet right ventricle with subaortic ventricular septal defect and pulmonary stenosis Fallot type
  • Double outlet right ventricle with subaortic ventricular septal defect without pulmonary stenosis
  • Double outlet right ventricle with subpulmonary ventricular septal defect
  • Doubly committed subarterial ventricular septal defect

Tabular List NotesGuidance

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

Inclusion Terms

  • Taussig-Bing syndrome

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.

    • Complex
      • Taussig-Bing (transposition, aorta and overriding pulmonary artery)
    • Defect, defective
      • Taussig-Bing (aortic transposition and overriding pulmonary artery)
    • Double
      • outlet
        • right ventricle
    • Origin of both great vessels from right ventricle
    • Taussig-Bing syndrome

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

  • Double Outlet Right Ventricle

    incomplete transposition of the great vessels in which both the aorta and the pulmonary artery arise from the right ventricle. the only outlet of the left ventricle is a large ventricular septal defect (ventricular septal defects or vsd). the various subtypes are classified by the location of the septal defect, such as subaortic, subpulmonary, or noncommitted.

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 Q20.1 to ICD-9-CMHistory

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

ICD-9-CM
745.11 Double outlet rt ventric
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 Q20.1Overview

Is Q20.1 (Congenital malformations of cardiac chambers and connections) a billable code?

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

What MS-DRG does Q20.1 group to?

When double outlet right ventricle 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 Q20.1 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 double outlet right ventricle on inpatient claims.

What is the ICD-9 equivalent of Q20.1?

Under the General Equivalence Mappings, double outlet right ventricle converts to ICD-9-CM 745.11 (double outlet rt ventric). 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.