I65Header code — not billable
Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction
Short description: Occls and stenosis of precerb art, not rslt in cereb infrc
- Chapter
- 9. Diseases of the circulatory system
- Category
- I65
- Effective date
- October 1, 2026
Related codes in category I65
I65.0Occlusion and stenosis of vertebral arteryI65.01Occlusion and stenosis of right vertebral arteryYesI65.02Occlusion and stenosis of left vertebral arteryYesI65.03Occlusion and stenosis of bilateral vertebral arteriesYesI65.09Occlusion and stenosis of unspecified vertebral arteryYesI65.1Occlusion and stenosis of basilar arteryYesI65.2Occlusion and stenosis of carotid arteryI65.21Occlusion and stenosis of right carotid arteryYesI65.22Occlusion and stenosis of left carotid arteryYesI65.23Occlusion and stenosis of bilateral carotid arteriesYesI65.29Occlusion and stenosis of unspecified carotid arteryYesI65.8Occlusion and stenosis of other precerebral arteriesYes
Frequently asked questions
What is ICD-10 code I65?
I65 is an ICD-10-CM diagnosis code for Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction.
Is I65 a billable code?
No. I65 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is I65 in?
I65 falls under Chapter 9: Diseases of the circulatory system.
When did I65 become effective?
I65 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to I65?
I65 belongs to category I65, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.