ICD-10-CM · Chapter 9 · I00–I99
I65.21
Occlusion and stenosis of right carotid artery
Diseases of the circulatory system
Quick facts
- Code
- I65.21
- Type
- Billable code
- ICD-10-CM chapter
- Chapter 9 — Diseases of the circulatory system
- Category
- I65 — Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction
- Specificity
- 5 characters
How coders use this code
ICD-10-CM I65.21 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of occlusion and stenosis of right carotid artery. Coders assign it when the chart documentation supports this level of detail, always matching to the most specific code available and verifying against the chapter-specific guidelines published annually by NCHS/CMS.
Related codes in I65
- I65Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction
- I65.0Occlusion and stenosis of vertebral artery
- I65.01Occlusion and stenosis of right vertebral artery
- I65.02Occlusion and stenosis of left vertebral artery
- I65.03Occlusion and stenosis of bilateral vertebral arteries
- I65.09Occlusion and stenosis of unspecified vertebral artery
- I65.1Occlusion and stenosis of basilar artery
- I65.2Occlusion and stenosis of carotid artery
- I65.22Occlusion and stenosis of left carotid artery
- I65.23Occlusion and stenosis of bilateral carotid arteries
- I65.29Occlusion and stenosis of unspecified carotid artery
- I65.8Occlusion and stenosis of other precerebral arteries
- I65.9Occlusion and stenosis of unspecified precerebral artery
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