2025 ICD-10-CM code I65
(Active) Effective Date: N/A Diseases of the circulatory system - Cerebrovascular diseases Diseases of the circulatory system (I00-I99) Feed
Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction. Includes embolism, narrowing, obstruction (complete) (partial), and thrombosis of precerebral artery.
Medical necessity is established by the presence of symptoms or clinical findings suggestive of precerebral artery disease, such as dizziness, vertigo, or TIAs.Diagnostic testing is necessary to confirm the diagnosis and assess the severity of the condition. Treatment is medically necessary to prevent stroke and improve blood flow to the brain.
Diagnosis and management of patients with occlusion and stenosis of precerebral arteries. This includes evaluating the degree of stenosis, identifying underlying causes, and implementing appropriate treatment strategies to prevent stroke.
In simple words: Narrowing or blockage of the arteries in the neck that supply blood to the brain, but not severe enough to cause a stroke.
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)
Example 1: A patient presents with dizziness and vertigo. Diagnostic imaging reveals stenosis of the right vertebral artery., A patient experiences transient ischemic attacks (TIAs). Further investigation shows occlusion of the left vertebral artery., A patient with a history of atherosclerosis is found to have bilateral vertebral artery stenosis during a routine check-up.
Documentation should include details of the diagnostic methods used (e.g., angiography, Doppler ultrasound), the specific artery affected (e.g., vertebral, basilar), the degree of stenosis or occlusion, and any associated symptoms or neurological deficits.
** Consider using additional codes to specify the affected artery (e.g., I65.0 for the right vertebral artery, I65.1 for the basilar artery), and any associated conditions like hypertension, or tobacco use.
- Payment Status: Active
- Specialties:Neurology, cardiology, vascular surgery
- Place of Service:Office, Inpatient Hospital, Outpatient Hospital, Independent Clinic