MCMedicalCodingSoftware
Q21.0

Q21.0: Ventricular septal defect

Billable / specific codeICD-10-CMPOA exempt

Q21.0 is a billable, specific ICD-10-CM code for ventricular septal defect. It is valid for submission on a claim.

Check Q21.0 with the rest of the claim: free scrubber

Inclusion terms

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

  • Roger's disease

Excludes1 inherited from the categories above Q21.0

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

Q21.0 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

  • Gerbode defect
  • Maladie de Roger
  • Roger's disease
  • Anomaly, anomalous›Gerbode
  • Closure›interventricular septum, defective
  • Defect, defective›bulbar septum
  • Defect, defective›Gerbode
  • Defect, defective›interventricular septal
  • Defect, defective›ventricular septal
  • Disease, diseased›Roger's(congenital interventricular septal defect)
  • Displacement, displaced›ventricular septum
  • Fusion, fused›ventricles, heart

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under Q21

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.