ICD-10-CM Code Q20.8

Other congenital malformations of cardiac chambers and connections

Version 2020 Billable Code POA Exempt

Valid for Submission

Q20.8 is a billable code used to specify a medical diagnosis of other congenital malformations of cardiac chambers and connections. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code Q20.8 might also be used to specify conditions or terms like abnormal atrial arrangement, abnormal connection of hepatic vein to atrium, abnormal connection of hepatic vein to atrium, abnormal connection of hepatic vein to atrium, abnormal relationship of aortic orifice to pulmonary orifice, abnormal relationship of right ventricle to left ventricle, etc The code is exempt from present on admission (POA) reporting for inpatient admissions to general acute care hospitals.

ICD-10:Q20.8
Short Description:Oth congenital malform of cardiac chambers and connections
Long Description:Other congenital malformations of cardiac chambers and connections

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code Q20.8:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Cor binoculare

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code Q20.8 are found in the index:


Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Abnormal atrial arrangement
  • Abnormal connection of hepatic vein to atrium
  • Abnormal connection of hepatic vein to atrium
  • Abnormal connection of hepatic vein to atrium
  • Abnormal relationship of aortic orifice to pulmonary orifice
  • Abnormal relationship of right ventricle to left ventricle
  • Abnormality of left atrial appendage
  • Abnormality of left atrial appendage
  • Abnormality of left atrial appendage
  • Abnormality of right atrial appendage
  • Abnormality of right atrial appendage
  • Abnormally small cardiac chamber
  • Absent atrioventricular connection with straddling valve
  • Absent left sided atrioventricular connection
  • Absent right sided atrioventricular connection
  • Aortic left ventricular tunnel
  • Aortic left ventricular tunnel
  • Aortic left ventricular tunnel
  • Aortic tunnel
  • Aortic tunnel
  • Aortic tunnel
  • Aortico-left ventricular tunnel of simple type
  • Aortico-left ventricular tunnel with aneurysm of intracardiac septal wall and aneurysm of extracardiac aortic wall
  • Aortico-left ventricular tunnel with extracardiac aneurysm of aortic wall
  • Aortico-left ventricular tunnel with extracardiac aneurysm of aortic wall
  • Aortico-left ventricular tunnel with intracardiac aneurysm of septal portion
  • Atrioventricular septal defect - ventricular component under inferior bridging leaflet
  • Atrioventricular septal defect - ventricular component under superior bridging leaflet
  • Atrioventricular septal defect - ventricular component under superior bridging leaflet
  • Atrioventricular septal defect - ventricular component under superior bridging leaflet
  • Atrioventricular septal defect with ventricular component under free floating superior bridging leaflet and chords to papillary muscle at right ventricular free wall
  • Atrioventricular septal defect with ventricular component under inferior bridging leaflet with chords to crest ventricular septum
  • Atrioventricular septal defect with ventricular component under superior bridging leaflet with chords at crest ventricular septum
  • Atrioventricular septal defect with ventricular component under superior bridging leaflet without chordal attachment to ventricular septal crest
  • Atrioventricular septal defect with ventricular imbalance consisting of dominant left ventricle and hypoplastic right ventricle
  • Bilateral atria
  • Bilateral isomeric atria
  • Bipartite right ventricle
  • Cardiac ventricular dilatation
  • Common atrioventricular valve in functionally univentricular heart
  • Concordant ventriculoarterial connection with parallel great arteries
  • Concordant ventriculoarterial connections
  • Congenital abnormality of cardiac ventricle
  • Congenital abnormality of hepatic vein
  • Congenital abnormality of hepatic vein
  • Congenital abnormality of hepatic vein
  • Congenital abnormality of mitral subvalvular apparatus
  • Congenital abnormality of posterior cardiac vein of left ventricle
  • Congenital abnormality of tricuspid leaflet
  • Congenital aneurysm of aorta
  • Congenital aneurysm of aorta
  • Congenital aneurysm of heart
  • Congenital aneurysm of heart
  • Congenital aneurysm of subaortic left ventricle
  • Congenital dilatation of aorta
  • Congenital dilatation of aorta
  • Congenital dilatation of atrium
  • Congenital dilatation of cardiac ventricle
  • Congenital hypoplasia of cardiac ventricle
  • Congenital left ventricular aneurysm
  • Congenital left ventricular submitral valve aneurysm
  • Congenital right ventricular aneurysm
  • Congenital right ventricular diverticulum
  • Cor biloculare
  • Cor triloculare
  • Diffuse hypoplasia of left ventricle
  • Divided left atrium with all pulmonary veins to proximal chamber without communication to left atrium
  • Divided left atrium with all pulmonary veins to proximal chamber without communication to left atrium with extracardiac pulmonary venous chamber communication
  • Divided left atrium with restrictive outlet of proximal chamber to left atrium
  • Double outlet from ventricle of indeterminate morphology
  • Dynamic right ventricular outflow tract obstruction
  • Ebstein's anomaly
  • Ebstein's anomaly of tricuspid valve with atrialization of right ventricular chamber
  • Ectasia of left atrial appendage
  • Ectasia of right atrial appendage
  • Failure of growth of fetal left cardiac ventricle
  • Failure of growth of fetal right cardiac ventricle
  • Functionally univentricular heart
  • Giant right atrium
  • Hepatic vein to left atrium and right atrium
  • Hepatic vein to left sided atrium
  • Hepatic vein to right sided atrium
  • Hypoplasia of left ventricular inflow tract
  • Hypoplasia of left ventricular outflow tract
  • Hypoplasia of trabecular portion of right ventricle
  • Indeterminate atrial arrangement
  • Indeterminate ventricular outflow tract obstruction
  • Isolated right ventricular hypoplasia
  • Left atrial appendage - right - juxtaposition
  • Left atrial appendage absent
  • Left pulmonary artery with absent proximal arterial connection
  • Left sided atrium connecting to both ventricles
  • Left sided atrium connecting to left ventricle
  • Left sided atrium connecting to right ventricle
  • Left sided atrium connecting to ventricle of indeterminate morphology
  • Left ventricular aneurysm
  • Left ventricular hypoplasia
  • Left ventricular outflow tract abnormality
  • Left ventricular outflow tract atresia
  • Left ventricular outflow tract obstruction
  • Left ventricular outflow tract obstruction due to aneurysm of membranous septum
  • Left ventricular outflow tract obstruction due to anterolateral muscle band
  • Left ventricular outflow tract obstruction due to atrioventricular valve
  • Left ventricular outflow tract obstruction due to prolapse of Eustachian valve
  • Left ventricular outflow tract obstruction due to prolapsed arterial valve
  • Left ventricular outflow tract obstruction due to subpulmonary fibromuscular shelf
  • Obstruction of right ventricular outflow tract due to aortico-left ventricular tunnel
  • Parallel course of aorta and pulmonary artery
  • Progression of fetal right ventricular outflow tract obstruction
  • Pulmonary artery with absent proximal arterial connection
  • Right atrial appendage absent
  • Right sided atrium connecting to both ventricles
  • Right sided atrium connecting to right ventricle
  • Right sided atrium connecting to ventricle of indeterminate morphology
  • Right ventricle anterior to left ventricle
  • Right ventricle inferior to left ventricle
  • Right ventricle posterior to left ventricle
  • Right ventricle superior to left ventricle
  • Right ventricle to left of left ventricle
  • Right ventricular aneurysm
  • Right ventricular diverticulum
  • Right ventricular outflow obstruction - localized
  • Right ventricular outflow obstruction - tubular
  • Right ventricular outflow tract abnormality
  • Right ventricular outflow tract absent
  • Right ventricular outflow tract atresia
  • Right ventricular outflow tract obstruction
  • Right ventricular outflow tract obstruction due to abnormal cardiac muscle bands
  • Right ventricular outflow tract obstruction due to aneurysm of membranous septum
  • Right ventricular outflow tract obstruction due to atrioventricular valve
  • Right ventricular outflow tract obstruction due to common atrioventricular valve
  • Right ventricular outflow tract obstruction due to fibromuscular shelf
  • Right ventricular outflow tract obstruction due to malaligned outlet septum
  • Right ventricular outflow tract obstruction due to prolapse of Eustachian valve
  • Right ventricular outflow tract obstruction due to prolapsed arterial valve
  • Right ventricular outflow tract obstruction due to septal hypertrophy
  • Right ventricular outflow tract obstruction due to septoparietal trabeculation
  • Single inlet ventricle with absent atrioventricular connection
  • Single outlet ventriculoarterial connection
  • Single ventricular outlet above right ventricle
  • Solitary ventricle of indeterminate morphology
  • Subaortic stenosis due to restrictive ventricular septal defect in functionally univentricular heart
  • Superior to inferior ventricular relationship
  • Supramitral left atrial ring
  • Thoracodidymus
  • Thoracodidymus
  • Thoracopagus
  • Thoracopagus
  • Thoracopagus with conjoined atria
  • Thoracopagus with conjoined atria and ventricles
  • Tripartite right ventricle
  • Two chambered right ventricle
  • Uniatrial biventricular connection with absent left sided atrioventricular connection with straddling valve
  • Uniatrial biventricular connection with absent right sided atrioventricular connection with straddling valve
  • Unipartite right ventricle
  • Univentricular atrioventricular connection with absent left sided atrioventricular connection
  • Univentricular atrioventricular connection with absent right sided atrioventricular connection
  • Ventricular imbalance
  • Ventricular imbalance with dominant right ventricle and hypoplastic left ventricle

Diagnostic Related Groups

The ICD-10 code Q20.8 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2019 through 09/30/2020.

  • 306 - CARDIAC CONGENITAL AND VALVULAR DISORDERS WITH MCC
  • 307 - CARDIAC CONGENITAL AND VALVULAR DISORDERS WITHOUT MCC

Present on Admission (POA)

Q20.8 is exempt from POA reporting - The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement. Review other POA exempt codes here .

CMS POA Indicator Options and Definitions
POA Indicator CodePOA Reason for CodeCMS will pay the CC/MCC DRG?
YDiagnosis was present at time of inpatient admission.YES
NDiagnosis was not present at time of inpatient admission.NO
UDocumentation insufficient to determine if the condition was present at the time of inpatient admission.NO
WClinically undetermined - unable to clinically determine whether the condition was present at the time of inpatient admission.YES
1Unreported/Not used - Exempt from POA reporting. NO

Convert Q20.8 to ICD-9

  • 745.19 - Transpos great vess NEC (Approximate Flag)
  • 745.7 - Cor biloculare (Approximate Flag)
  • 745.8 - Septal closure anom NEC (Approximate Flag)

Code Classification

  • Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
    • Congenital malformations of the circulatory system (Q20-Q28)
      • Congenital malformations of cardiac chambers and connections (Q20)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Congenital Heart Defects

A congenital heart defect is a problem with the structure of the heart. It is present at birth. Congenital heart defects are the most common type of birth defect. The defects can involve the walls of the heart, the valves of the heart, and the arteries and veins near the heart. They can disrupt the normal flow of blood through the heart. The blood flow can slow down, go in the wrong direction or to the wrong place, or be blocked completely.

Doctors use a physical exam and special heart tests to diagnose congenital heart defects. They often find severe defects during pregnancy or soon after birth. Signs and symptoms of severe defects in newborns include

  • Rapid breathing
  • Cyanosis - a bluish tint to the skin, lips, and fingernails
  • Fatigue
  • Poor blood circulation

Many congenital heart defects cause few or no signs and symptoms. They are often not diagnosed until children are older.

Many children with congenital heart defects don't need treatment, but others do. Treatment can include medicines, catheter procedures, surgery, and heart transplants. The treatment depends on the type of the defect, how severe it is, and a child's age, size, and general health.

NIH: National Heart, Lung, and Blood Institute


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