Q20.4

Q20.4: Double inlet ventricle

Billable / specific codeICD-10-CMPOA exempt

Q20.4 is a billable, specific ICD-10-CM code for double inlet ventricle. It is valid for submission on a claim.

Check Q20.4 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Common ventricle
Cor triloculare biatriatum
Single ventricle

Excludes1 inherited from the categories above Q20.4

A category’s note binds every code beneath it.

Written on Q20: Congenital malformations of cardiac chambers and connections

dextrocardia with situs inversus (Q89.3)
mirror-image atrial arrangement with situs inversus (Q89.3)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

Q20.4 is named in 18 Medicare coverage policies: 18 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
A52868Billing and Coding: Transesophageal Echocardiography (TEE)
A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
A56451Billing and Coding: Cardiac Computed Tomography (CCT) and Coronary Computed Tomography Angiography (CCTA)

Alphabetic index entries that lead here

Absence›ventricular septum
Common›ventricle
Double›inlet ventricle
Single›ventricle
Absence›septum›ventricular(congenital)
Agenesis›septum›ventricular
Cor›triloculare›biatrium
Displacement, displaced›ventricular septum›with rudimentary ventricle

Code history

Unchanged in every release from FY2024 to FY2027.