I63.81 — Other cerebral infarction due to occlusion or stenosis of small artery
I63.81 is a billable, specific ICD-10-CM code for other cerebral infarction due to occlusion or stenosis of small artery. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Lacunar infarction
Risk adjustment
I63.81 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
I63.81 is named in 47 Medicare coverage policies — 47 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
- A53057Billing and Coding: Home Health Occupational Therapy
How I63.81 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to I63.81.
- Infarct, infarction›lacunar
- Infarct, infarction›cerebral›due to›occlusion NEC›small artery
- Infarct, infarction›cerebral›due to›stenosis NEC›small artery
Related codes at this level
Codes that share I63.8. If I63.81 is not quite right, the correct code is usually one of these.
Questions about I63.81
- Is I63.81 a billable ICD-10-CM code?
- Yes. I63.81 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I63.81 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Cerebrovascular diseases (I60-I69).