MCMedicalCodingSoftware
I77.74

I77.74: Dissection of vertebral artery

Billable / specific codeICD-10-CM

I77.74 is a billable, specific ICD-10-CM code for dissection of vertebral artery. It is valid for submission on a claim.

Check I77.74 with the rest of the claim: free scrubber

Excludes2: not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

  • aneurysm of vertebral artery (I72.6)

Excludes2 inherited from the categories above I77.74

Not part of this code, but both may be coded when both are present.

Written on I77.7: Other arterial dissection

  • dissection of aorta (I71.0-)
  • dissection of coronary artery (I25.42)

Written on I77: Other disorders of arteries and arterioles

  • collagen (vascular) diseases (M30-M36)
  • hypersensitivity angiitis (M31.0)
  • pulmonary artery (I28.-)

Risk adjustment

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

Medicare coverage

I77.74 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
  • A56500Billing and Coding: Cardiac Catheterization and Coronary Angiography
  • A56631Billing and Coding: Thoracic Aortography and Carotid, Vertebral, and Subclavian Angiography
  • A56697Billing and Coding: Non-Invasive Vascular Studies

Alphabetic index entries that lead here

  • Dissection›artery›vertebral

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under I77.7

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.