ICD-10-CM Tabular Index · Chapter 9 · FY 2027 I63

Cerebral infarction (I63) ICD-10-CM

The I63 code range covers cerebral infarction with 117 ICD-10-CM diagnosis codes. 91 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.

✓ Built from the official CMS FY 2027 datasetEffective Oct 1, 2026 – Sep 30, 2027
117
Diagnosis Codes
91
Billable Codes
I63
Code Range
I60–I69
Parent Section

Includes

This note appears immediately under a three character code title to further define, or give examples of, the content of the category.

Use Additional Code

The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

Type 2 Excludes

A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

ICD-10-CM

Codes in the I63 Range 117 codes · 91 billable

117 of 117 shown
  • I63 Cerebral infarctionNon-billable
  • I63.0 Cerebral infarction due to thrombosis of precerebral arteriesNon-billable
  • I63.00 Cerebral infarction due to thrombosis of unspecified precerebral artery
  • I63.01 Cerebral infarction due to thrombosis of vertebral arteryNon-billable
  • I63.011 Cerebral infarction due to thrombosis of right vertebral artery
  • I63.012 Cerebral infarction due to thrombosis of left vertebral artery
  • I63.013 Cerebral infarction due to thrombosis of bilateral vertebral arteries
  • I63.019 Cerebral infarction due to thrombosis of unspecified vertebral artery
  • I63.02 Cerebral infarction due to thrombosis of basilar artery
  • I63.03 Cerebral infarction due to thrombosis of carotid arteryNon-billable
  • I63.031 Cerebral infarction due to thrombosis of right carotid artery
  • I63.032 Cerebral infarction due to thrombosis of left carotid artery
  • I63.033 Cerebral infarction due to thrombosis of bilateral carotid arteries
  • I63.039 Cerebral infarction due to thrombosis of unspecified carotid artery
  • I63.09 Cerebral infarction due to thrombosis of other precerebral artery
  • I63.1 Cerebral infarction due to embolism of precerebral arteriesNon-billable
  • I63.10 Cerebral infarction due to embolism of unspecified precerebral artery
  • I63.11 Cerebral infarction due to embolism of vertebral arteryNon-billable
  • I63.111 Cerebral infarction due to embolism of right vertebral artery
  • I63.112 Cerebral infarction due to embolism of left vertebral artery
  • I63.113 Cerebral infarction due to embolism of bilateral vertebral arteries
  • I63.119 Cerebral infarction due to embolism of unspecified vertebral artery
  • I63.12 Cerebral infarction due to embolism of basilar artery
  • I63.13 Cerebral infarction due to embolism of carotid arteryNon-billable
  • I63.131 Cerebral infarction due to embolism of right carotid artery
  • I63.132 Cerebral infarction due to embolism of left carotid artery
  • I63.133 Cerebral infarction due to embolism of bilateral carotid arteries
  • I63.139 Cerebral infarction due to embolism of unspecified carotid artery
  • I63.19 Cerebral infarction due to embolism of other precerebral artery
  • I63.2 Cerebral infarction due to unspecified occlusion or stenosis of precerebral arteriesNon-billable
  • I63.20 Cerebral infarction due to unspecified occlusion or stenosis of unspecified precerebral arteries
  • I63.21 Cerebral infarction due to unspecified occlusion or stenosis of vertebral arteriesNon-billable
  • I63.211 Cerebral infarction due to unspecified occlusion or stenosis of right vertebral artery
  • I63.212 Cerebral infarction due to unspecified occlusion or stenosis of left vertebral artery
  • I63.213 Cerebral infarction due to unspecified occlusion or stenosis of bilateral vertebral arteries
  • I63.219 Cerebral infarction due to unspecified occlusion or stenosis of unspecified vertebral artery
  • I63.22 Cerebral infarction due to unspecified occlusion or stenosis of basilar artery
  • I63.23 Cerebral infarction due to unspecified occlusion or stenosis of carotid arteriesNon-billable
  • I63.231 Cerebral infarction due to unspecified occlusion or stenosis of right carotid arteries
  • I63.232 Cerebral infarction due to unspecified occlusion or stenosis of left carotid arteries
  • I63.233 Cerebral infarction due to unspecified occlusion or stenosis of bilateral carotid arteries
  • I63.239 Cerebral infarction due to unspecified occlusion or stenosis of unspecified carotid artery
  • I63.29 Cerebral infarction due to unspecified occlusion or stenosis of other precerebral arteries
  • I63.3 Cerebral infarction due to thrombosis of cerebral arteriesNon-billable
  • I63.30 Cerebral infarction due to thrombosis of unspecified cerebral artery
  • I63.31 Cerebral infarction due to thrombosis of middle cerebral arteryNon-billable
  • I63.311 Cerebral infarction due to thrombosis of right middle cerebral artery
  • I63.312 Cerebral infarction due to thrombosis of left middle cerebral artery
  • I63.313 Cerebral infarction due to thrombosis of bilateral middle cerebral arteries
  • I63.319 Cerebral infarction due to thrombosis of unspecified middle cerebral artery
  • I63.32 Cerebral infarction due to thrombosis of anterior cerebral arteryNon-billable
  • I63.321 Cerebral infarction due to thrombosis of right anterior cerebral artery
  • I63.322 Cerebral infarction due to thrombosis of left anterior cerebral artery
  • I63.323 Cerebral infarction due to thrombosis of bilateral anterior cerebral arteries
  • I63.329 Cerebral infarction due to thrombosis of unspecified anterior cerebral artery
  • I63.33 Cerebral infarction due to thrombosis of posterior cerebral arteryNon-billable
  • I63.331 Cerebral infarction due to thrombosis of right posterior cerebral artery
  • I63.332 Cerebral infarction due to thrombosis of left posterior cerebral artery
  • I63.333 Cerebral infarction due to thrombosis of bilateral posterior cerebral arteries
  • I63.339 Cerebral infarction due to thrombosis of unspecified posterior cerebral artery
  • I63.34 Cerebral infarction due to thrombosis of cerebellar arteryNon-billable
  • I63.341 Cerebral infarction due to thrombosis of right cerebellar artery
  • I63.342 Cerebral infarction due to thrombosis of left cerebellar artery
  • I63.343 Cerebral infarction due to thrombosis of bilateral cerebellar arteries
  • I63.349 Cerebral infarction due to thrombosis of unspecified cerebellar artery
  • I63.39 Cerebral infarction due to thrombosis of other cerebral artery
  • I63.4 Cerebral infarction due to embolism of cerebral arteriesNon-billable
  • I63.40 Cerebral infarction due to embolism of unspecified cerebral artery
  • I63.41 Cerebral infarction due to embolism of middle cerebral arteryNon-billable
  • I63.411 Cerebral infarction due to embolism of right middle cerebral artery
  • I63.412 Cerebral infarction due to embolism of left middle cerebral artery
  • I63.413 Cerebral infarction due to embolism of bilateral middle cerebral arteries
  • I63.419 Cerebral infarction due to embolism of unspecified middle cerebral artery
  • I63.42 Cerebral infarction due to embolism of anterior cerebral arteryNon-billable
  • I63.421 Cerebral infarction due to embolism of right anterior cerebral artery
  • I63.422 Cerebral infarction due to embolism of left anterior cerebral artery
  • I63.423 Cerebral infarction due to embolism of bilateral anterior cerebral arteries
  • I63.429 Cerebral infarction due to embolism of unspecified anterior cerebral artery
  • I63.43 Cerebral infarction due to embolism of posterior cerebral arteryNon-billable
  • I63.431 Cerebral infarction due to embolism of right posterior cerebral artery
  • I63.432 Cerebral infarction due to embolism of left posterior cerebral artery
  • I63.433 Cerebral infarction due to embolism of bilateral posterior cerebral arteries
  • I63.439 Cerebral infarction due to embolism of unspecified posterior cerebral artery
  • I63.44 Cerebral infarction due to embolism of cerebellar arteryNon-billable
  • I63.441 Cerebral infarction due to embolism of right cerebellar artery
  • I63.442 Cerebral infarction due to embolism of left cerebellar artery
  • I63.443 Cerebral infarction due to embolism of bilateral cerebellar arteries
  • I63.449 Cerebral infarction due to embolism of unspecified cerebellar artery
  • I63.49 Cerebral infarction due to embolism of other cerebral artery
  • I63.5 Cerebral infarction due to unspecified occlusion or stenosis of cerebral arteriesNon-billable
  • I63.50 Cerebral infarction due to unspecified occlusion or stenosis of unspecified cerebral artery
  • I63.51 Cerebral infarction due to unspecified occlusion or stenosis of middle cerebral arteryNon-billable
  • I63.511 Cerebral infarction due to unspecified occlusion or stenosis of right middle cerebral artery
  • I63.512 Cerebral infarction due to unspecified occlusion or stenosis of left middle cerebral artery
  • I63.513 Cerebral infarction due to unspecified occlusion or stenosis of bilateral middle cerebral arteries
  • I63.519 Cerebral infarction due to unspecified occlusion or stenosis of unspecified middle cerebral artery
  • I63.52 Cerebral infarction due to unspecified occlusion or stenosis of anterior cerebral arteryNon-billable
  • I63.521 Cerebral infarction due to unspecified occlusion or stenosis of right anterior cerebral artery
  • I63.522 Cerebral infarction due to unspecified occlusion or stenosis of left anterior cerebral artery
  • I63.523 Cerebral infarction due to unspecified occlusion or stenosis of bilateral anterior cerebral arteries
  • I63.529 Cerebral infarction due to unspecified occlusion or stenosis of unspecified anterior cerebral artery
  • I63.53 Cerebral infarction due to unspecified occlusion or stenosis of posterior cerebral arteryNon-billable
  • I63.531 Cerebral infarction due to unspecified occlusion or stenosis of right posterior cerebral artery
  • I63.532 Cerebral infarction due to unspecified occlusion or stenosis of left posterior cerebral artery
  • I63.533 Cerebral infarction due to unspecified occlusion or stenosis of bilateral posterior cerebral arteries
  • I63.539 Cerebral infarction due to unspecified occlusion or stenosis of unspecified posterior cerebral artery
  • I63.54 Cerebral infarction due to unspecified occlusion or stenosis of cerebellar arteryNon-billable
  • I63.541 Cerebral infarction due to unspecified occlusion or stenosis of right cerebellar artery
  • I63.542 Cerebral infarction due to unspecified occlusion or stenosis of left cerebellar artery
  • I63.543 Cerebral infarction due to unspecified occlusion or stenosis of bilateral cerebellar arteries
  • I63.549 Cerebral infarction due to unspecified occlusion or stenosis of unspecified cerebellar artery
  • I63.59 Cerebral infarction due to unspecified occlusion or stenosis of other cerebral artery
  • I63.6 Cerebral infarction due to cerebral venous thrombosis, nonpyogenic
  • I63.8 Other cerebral infarctionNon-billable
  • I63.81 Other cerebral infarction due to occlusion or stenosis of small artery
  • I63.89 Other cerebral infarction
  • I63.9 Cerebral infarction, unspecified

Clinical Terms in This Code Range

Definitions from the National Library of Medicine for conditions coded in the I63 range.

Cerebral Infarction

The formation of an area of NECROSIS in the CEREBRUM caused by an insufficiency of arterial or venous blood flow. Infarcts of the cerebrum are generally classified by hemisphere (i.e., left vs. right), lobe (e.g., frontal lobe infarction), arterial distribution (e.g., INFARCTION, ANTERIOR CEREBRAL ARTERY), and etiology (e.g., embolic infarction).

About the I63 Code Range

Cerebral infarction is an area of dead tissue in the cerebrum, part of the brain, caused by too little blood flow through an artery or vein.

The artery codes first separate arteries leading to the brain from arteries in the brain. For arteries leading to the brain, I63.0 identifies thrombosis, I63.1 embolism, and I63.2 unspecified blockage or narrowing. I63.3, I63.4, and I63.5 make the same distinctions for arteries in the brain. Their subdivisions identify the artery when specified.

Other codes identify thrombosis in a cerebral vein without pus formation, small-artery blockage or narrowing, other infarctions, and infarction without further detail.

Questions About This Page

How many billable codes are in the I63 range?

Of the 117 codes in this range, 91 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.

What does the I63 range classify?

The range classifies cerebral infarction. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.

Related References

Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.