Is I63 a billable ICD-10-CM code?

No. I63 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does I63 sit in the tabular list?

Diseases of the circulatory system (I00-I99), in the block Cerebrovascular diseases (I60-I69).

What cannot be coded together with I63?

I63 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

I63

I63 — Cerebral infarction

Non-billable headerICD-10-CM

I63 is a non-billable header ICD-10-CM code for cerebral infarction. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

neonatal cerebral infarction (P91.82-)

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

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

Use additional code

Add a secondary code to capture the detail described below.

code, if applicable, to identify status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility (Z92.82)
code, if known, to indicate National Institutes of Health Stroke Scale (NIHSS) score (R29.7-)

Includes

Conditions this code covers.

occlusion and stenosis of cerebral and precerebral arteries, resulting in cerebral infarction

Other codes that can never be billed with I63

These codes carry an Excludes1 note pointing at I63. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading I63 alone.

P91.82Neonatal cerebral infarction
I65Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction
I66Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
I67Other cerebrovascular diseases
I67.6Nonpyogenic thrombosis of intracranial venous system

Risk adjustment

I63 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

9 child codes. Green means billable.

Questions about I63

Is I63 a billable ICD-10-CM code?: No. I63 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does I63 sit in the tabular list?: Diseases of the circulatory system (I00-I99), in the block Cerebrovascular diseases (I60-I69).
What cannot be coded together with I63?: I63 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.