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ICD-10-CM 2027 diagnosis code

I65.2Occlusion and stenosis of carotid artery

Not billable — use a more specific code

I65.2 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About I65.2

I65.2 is the ICD-10-CM diagnosis code for occlusion and stenosis of carotid artery. It belongs to category I65 (occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction), block I60-I69 (cerebrovascular diseases) and chapter 9 (diseases of the circulatory system). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within I65 (occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction), I65.2 is specifically for occlusion and stenosis of carotid artery. Related codes cover vertebral artery (I65.0), basilar artery (I65.1), other precerebral arteries (I65.8) and unspecified precerebral artery (I65.9).

To report this condition, pick the subcode that matches the documentation: I65.21 (artery), I65.22 (artery), I65.23 (arteries) and I65.29 (artery).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under I65.2

Notes that apply from higher levels

Instructions written at a parent level also apply to I65.2.

› From 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
Excludes1
  • insufficiency, NOS, of precerebral artery (G45.-)
  • insufficiency of precerebral arteries causing cerebral infarction (I63.0-I63.2)

Broader instructions also apply from I60-I69 Cerebrovascular diseases and Chapter 9: Diseases of the circulatory system.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to I65.2.

Codes whose notes reference I65.2

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about I65.2

Is I65.2 billable?

No. I65.2 is a header code. Report one of its more specific subcodes instead.