MCMCB Pro
I63.039

I63.039Cerebral infarction due to thrombosis of unspecified carotid artery

Billable / specific codeICD-10-CM

I63.039 is a billable, specific ICD-10-CM code for cerebral infarction due to thrombosis of unspecified carotid artery. It is valid for submission on a claim.

Risk adjustment

I63.039 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

  • HCC 249 Ischemic or Unspecified Stroke0.239 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

I63.039 is named in 11 Medicare coverage policies 11 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
  • A56722Billing and Coding: Intraoperative Neurophysiological Testing
  • A56747Billing and Coding: Magnetic Resonance Angiography (MRA)
  • A57174Billing and Coding: MolDX: Pharmacogenomics Testing

Related codes at this level

Codes that share I63.03. If I63.039 is not quite right, the correct code is usually one of these.

Questions about I63.039

Is I63.039 a billable ICD-10-CM code?
Yes. I63.039 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does I63.039 sit in the tabular list?
Diseases of the circulatory system (I00-I99), in the block Cerebrovascular diseases (I60-I69).
ICD-10-CMFY2026-Apr· effective April 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.