I63.21
I63.21 — Cerebral infarction due to unspecified occlusion or stenosis of vertebral arteries
Non-billable headerICD-10-CM
I63.21 is a non-billable header ICD-10-CM code for cerebral infarction due to unspecified occlusion or stenosis of vertebral arteries. It cannot be billed on its own: choose one of the more specific child codes below.
Risk adjustment
I63.21 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code to one of these instead I63.21
4 child codes. Green means billable.
- I63.211Cerebral infarction due to unspecified occlusion or stenosis of right vertebral artery
- I63.212Cerebral infarction due to unspecified occlusion or stenosis of left vertebral artery
- I63.213Cerebral infarction due to unspecified occlusion or stenosis of bilateral vertebral arteries
- I63.219Cerebral infarction due to unspecified occlusion or stenosis of unspecified vertebral artery
Related codes at this level
Codes that share I63.2. If I63.21 is not quite right, the correct code is usually one of these.
- I63.20Cerebral infarction due to unspecified occlusion or stenosis of unspecified precerebral arteries
- I63.22Cerebral infarction due to unspecified occlusion or stenosis of basilar artery
- I63.23Cerebral infarction due to unspecified occlusion or stenosis of carotid arteries
- I63.29Cerebral infarction due to unspecified occlusion or stenosis of other precerebral arteries
Questions about I63.21
- Is I63.21 a billable ICD-10-CM code?
- No. I63.21 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does I63.21 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Cerebrovascular diseases (I60-I69).