Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction (I66)

Browse all the diagnosis codes used for occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction (i66). For easy navigation, the diagnosis codes are sorted in alphabetical order and grouped by sections. Each section is clearly marked with its description, and the corresponding three-digit code range. This format makes it simple to browse diagnosis codes in this chapter or section and find what you're looking for. We've also added green checkmark icons to label billable codes, and red warning icons for non-billable ones. This makes it easy to identify which codes can be billed.

Instructional Notations

Includes

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

• embolism of cerebral artery
• narrowing of cerebral artery
• obstruction (complete) (partial) of cerebral artery
• thrombosis of cerebral artery

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.

• Occlusion and stenosis of cerebral artery causing cerebral infarction I63.3 I63.5