I65Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction
Code usage status
Primary diagnosis
Select a more specific code
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Do not use I65 directly
Use the most specific code supported by the record.
- Chapter IX
- Diseases of the circulatory system
- Group I60-I69
- Cerebrovascular diseases
- Official Vietnamese name
- Tắc và/hoặc hẹp động mạch trước não, không dẫn đến nhồi máu não
- Additional WHO coding guidance
- Incl.: embolism of basilar, carotid or vertebral arteries, not resulting in cerebral infarction narrowing of basilar, carotid or vertebral arteries, not resulting in cerebral infarction obstruction (complete)(partial) of basilar, carotid or vertebral arteries, not resulting in cerebral infarction thrombosis of basilar, carotid or vertebral arteries, not resulting in cerebral infarction Excl.: when causing cerebral infarction (I63.-)
Related I65 codes
I65.0
Primary diagnosis candidate
Occlusion and stenosis of vertebral artery
I65.1
Primary diagnosis candidate
Occlusion and stenosis of basilar artery
I65.2
Primary diagnosis candidate
Occlusion and stenosis of carotid artery
I65.3
Primary diagnosis candidate
Occlusion and stenosis of multiple and bilateral precerebral arteries
I65.8
Primary diagnosis candidate
Occlusion and stenosis of other precerebral artery
I65.9
Primary diagnosis candidate
Occlusion and stenosis of unspecified precerebral artery
Clinical record checklist
View coding guide →- Confirm that the code matches the final documented diagnosis.
- Use one primary-diagnosis code and record only relevant additional conditions.
- Review Ministry indicators, inclusions, exclusions and notes.
- Do not infer a diagnosis beyond the clinical record.
2026 regulatory basis
Indicators are taken from columns 24–29 of the classification accompanying Circular 06/2026/TT-BYT, cross-referenced with Decision 1849/QĐ-BYT and Official Dispatch 4059/BYT-BH.
