ICD-10-CM · Chapter 9 · I00-I99
I65 Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction
Includes
- embolism of precerebral artery
- narrowing of precerebral artery
- obstruction (complete) (partial) of precerebral artery
- thrombosis of precerebral artery
Excludes 1 (cannot be coded together)
- insufficiency, NOS, of precerebral artery (G45.-)
- insufficiency of precerebral arteries causing cerebral infarction (I63.0-I63.2)
Subcodes
Each subcode links to a detail page with full clinical annotations.
| Code | Description | Billable |
|---|---|---|
| I65..0 | Occlusion and stenosis of vertebral artery | No |
| I65..01 | Occlusion and stenosis of right vertebral artery | Yes |
| I65..02 | Occlusion and stenosis of left vertebral artery | Yes |
| I65..03 | Occlusion and stenosis of bilateral vertebral arteries | Yes |
| I65..09 | Occlusion and stenosis of unspecified vertebral artery | Yes |
| I65..1 | Occlusion and stenosis of basilar artery | Yes |
| I65..2 | Occlusion and stenosis of carotid artery | No |
| I65..21 | Occlusion and stenosis of right carotid artery | Yes |
| I65..22 | Occlusion and stenosis of left carotid artery | Yes |
| I65..23 | Occlusion and stenosis of bilateral carotid arteries | Yes |
| I65..29 | Occlusion and stenosis of unspecified carotid artery | Yes |
| I65..8 | Occlusion and stenosis of other precerebral arteries | Yes |
| I65..9 | Occlusion and stenosis of unspecified precerebral artery | Yes |
Last reviewed: September 2026