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.

Excludes1 inherited from the categories above I63.21

A category’s note binds every code beneath it.

Written on I63: Cerebral infarction

neonatal cerebral infarction (P91.82-)

Excludes2 inherited from the categories above I63.21

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

Written on I63: Cerebral infarction

chronic, without residual deficits (sequelae) (Z86.73)
sequelae of cerebral infarction (I69.3-)

Other codes that can never be billed with I63.21

Their own Excludes1 notes name this code, so the conflict is not listed above.

P91.82Neonatal cerebral infarction

Risk adjustment

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

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead I63.21

4 child codes. Green means billable.