Q21.8

Q21.8: Other congenital malformations of cardiac septa

Billable / specific codeICD-10-CMPOA exempt

Q21.8 is a billable, specific ICD-10-CM code for other congenital malformations of cardiac septa. It is valid for submission on a claim.

Check Q21.8 with the rest of the claim: free scrubber

Code also

Both codes may be needed to describe the encounter fully. Sequencing depends on the reason for the visit.

, if applicable:
Eisenmenger's complex (I27.83)
Eisenmenger's syndrome (I27.83)

Inclusion terms

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

Eisenmenger's defect
Pentalogy of Fallot

Excludes1 inherited from the categories above Q21.8

A category’s note binds every code beneath it.

Written on Q21: Congenital malformations of cardiac septa

acquired cardiac septal defect (I51.0)

Risk adjustment

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

Medicare coverage

Q21.8 is named in 14 Medicare coverage policies: 14 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
A56451Billing and Coding: Cardiac Computed Tomography (CCT) and Coronary Computed Tomography Angiography (CCTA)
A56476Billing and Coding: Cardiac Radionuclide Imaging

Alphabetic index entries that lead here

Bulbus cordis(left ventricle) (persistent)
Pentalogy of Fallot
Anomaly, anomalous›Eisenmenger's(ventricular septal defect)
Defect, defective›Eisenmenger's
Eisenmenger's›defect
Fallot's›pentalogy
Persistence, persistent›bulbus cordis in left ventricle
Premature›closure, foramen ovale
Anomaly, anomalous›cardiac›septal closure›specified NEC
Anomaly, anomalous›heart›septum›specified NEC
Malformation›cardiac›septum›specified type NEC

Code history

Unchanged in every release from FY2024 to FY2027.