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Q26.8

Q26.8: Other congenital malformations of great veins

Billable / specific codeICD-10-CMPOA exempt

Q26.8 is a billable, specific ICD-10-CM code for other congenital malformations of great veins. It is valid for submission on a claim.

Check Q26.8 with the rest of the claim: free scrubber

Inclusion terms

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

  • Absence of vena cava (inferior) (superior)
  • Azygos continuation of inferior vena cava
  • Persistent left posterior cardinal vein
  • Scimitar syndrome

Risk adjustment

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

Medicare coverage

Q26.8 is named in 15 Medicare coverage policies: 15 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A52868Billing and Coding: Transesophageal Echocardiography (TEE)
  • A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
  • A56414Billing and Coding: Endovenous Stenting
  • A56451Billing and Coding: Cardiac Computed Tomography (CCT) and Coronary Computed Tomography Angiography (CCTA)

Alphabetic index entries that lead here

  • Scimitar syndrome
  • Absence›superior vena cava, congenital
  • Absence›vena cava, congenital(inferior) (superior)
  • Agenesis›vena cava(inferior) (superior)
  • Anomaly, anomalous›venous return
  • Atresia, atretic›vena cava(inferior) (superior)
  • Azygos›continuation inferior vena cava
  • Hypoplasia, hypoplastic›vena cava(inferior) (superior)
  • Syndrome›scimitar
  • Absence›vein congenital NEC›great
  • Agenesis›vein›great NEC
  • Atresia, atretic›vein NEC›great

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under Q26

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.