Is I63.3 a billable ICD-10-CM code?

No. I63.3 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does I63.3 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 I63.3?

I63.3 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above I63.3 (I63) and apply to it just the same.

I63.3

I63.3 — Cerebral infarction due to thrombosis of cerebral arteries

Non-billable headerICD-10-CM

I63.3 is a non-billable header ICD-10-CM code for cerebral infarction due to thrombosis of cerebral arteries. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above I63.3

These are not written on I63.3, but they bind it: a note on a category applies to every code beneath it. Billing I63.3 with anything listed here is a denial.

Written on I63 — Cerebral infarction

neonatal cerebral infarction (P91.82-)

Excludes2 inherited from the categories above I63.3

Also inherited, and the opposite of Excludes1: these conditions are not part of I63.3, but a patient can have both, so you may code both.

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 I63.3

These codes carry an Excludes1 note pointing at I63.3. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading I63.3 alone.

I66Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
I67Other cerebrovascular diseases
P91.82Neonatal cerebral infarction

Risk adjustment

I63.3 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 history

I63.3 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead I63.3

6 child codes. Green means billable.

Related codes at this level

Codes that share I63. If I63.3 is not quite right, the correct code is usually one of these.

Questions about I63.3

Is I63.3 a billable ICD-10-CM code?: No. I63.3 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does I63.3 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 I63.3?: I63.3 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above I63.3 (I63) and apply to it just the same.