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Q25.42

Q25.42: Hypoplasia of aorta

Billable / specific codeICD-10-CMPOA exempt

Q25.42 is a billable, specific ICD-10-CM code for hypoplasia of aorta. It is valid for submission on a claim.

Check Q25.42 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above Q25.42

A category’s note binds every code beneath it.

Written on Q25.4: Other congenital malformations of aorta

  • hypoplasia of aorta in hypoplastic left heart syndrome (Q23.4)

Risk adjustment

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

Medicare coverage

Q25.42 is named in 17 Medicare coverage policies: 17 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)
  • A55336Billing and Coding: Retroperitoneal Ultrasound
  • A56451Billing and Coding: Cardiac Computed Tomography (CCT) and Coronary Computed Tomography Angiography (CCTA)

Alphabetic index entries that lead here

  • Hypoplasia, hypoplastic›aorta, aortic
  • Malformation›aorta›hypoplasia

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under Q25.4

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.