I63.521
I63.521 — Cerebral infarction due to unspecified occlusion or stenosis of right anterior cerebral artery
Billable / specific codeICD-10-CMright
I63.521 is a billable, specific ICD-10-CM code for cerebral infarction due to unspecified occlusion or stenosis of right anterior cerebral artery. It is valid for submission on a claim.
Risk adjustment
I63.521 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
I63.521 is named in 42 Medicare coverage policies — 42 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52868Billing and Coding: Transesophageal Echocardiography (TEE)
- A52992Billing and Coding: Non-Invasive Cerebrovascular Arterial Studies
- A52992Billing and Coding: Non-Invasive Cerebrovascular Arterial Studies
- A56476Billing and Coding: Cardiac Radionuclide Imaging
Related codes at this level
Codes that share I63.52. If I63.521 is not quite right, the correct code is usually one of these.
- I63.522Cerebral infarction due to unspecified occlusion or stenosis of left anterior cerebral artery
- I63.523Cerebral infarction due to unspecified occlusion or stenosis of bilateral anterior cerebral arteries
- I63.529Cerebral infarction due to unspecified occlusion or stenosis of unspecified anterior cerebral artery
Questions about I63.521
- Is I63.521 a billable ICD-10-CM code?
- Yes. I63.521 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I63.521 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Cerebrovascular diseases (I60-I69).