I65.02 is the authoritative medical code for Occlusion and stenosis of left vertebral artery. This classification is used in medical billing and clinical recording to specify the clinical criteria for occlusion and stenosis of left vertebral artery (ICD-10-CM I65.02), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Occlusion and stenosis of left vertebral artery is a billable ICD-10-CM diagnosis code I65.02. Includes: embolism of precerebral artery; narrowing of precerebral artery; obstruction complete partial of precerebral artery; thrombosis of precerebral artery. Excludes1 (not coded here): insufficiency, NOS, of precerebral artery G45.-; insufficiency of precerebral arteries causing cerebral infarction I63.0-I63.2; traumatic intracranial hemorrhage S06.-. Use additional code: code to identify presence of:; alcohol abuse and dependence F10.-; exposure to environmental tobacco smoke Z77.22; history of tobacco dependence Z87.891; hypertension I10-I1A; occupational exposure to environmental tobacco smoke Z57.31; tobacco dependence F17.-; tobacco use Z72.0.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for I65.02 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- embolism of precerebral artery
- narrowing of precerebral artery
- obstruction complete partial of precerebral artery
- thrombosis of precerebral artery
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- insufficiency, NOS, of precerebral artery G45.-
- insufficiency of precerebral arteries causing cerebral infarction I63.0-I63.2
- traumatic intracranial hemorrhage S06.-
Use Additional Code
Supplementary codes the tabular list directs you to add.
- code to identify presence of:
- alcohol abuse and dependence F10.-
- exposure to environmental tobacco smoke Z77.22
- history of tobacco dependence Z87.891
- hypertension I10-I1A
- occupational exposure to environmental tobacco smoke Z57.31
- tobacco dependence F17.-
- tobacco use Z72.0
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with I65.02?
Per Excludes1 instructions, I65.02 must not be reported with: insufficiency, NOS, of precerebral artery (G45.-); insufficiency of precerebral arteries causing cerebral infarction (I63.0-I63.2); traumatic intracranial hemorrhage (S06.-).
Is an additional code needed with I65.02?
Use additional code(s) to specify: code to identify presence of:; alcohol abuse and dependence (F10.-); exposure to environmental tobacco smoke (Z77.22); history of tobacco dependence (Z87.891).
Codes in This Family (13)
Official ICD-10-CM classifications in the same code family as I65.02, with their registry titles.
- I65 — Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction
- I65.0 — Occlusion and stenosis of vertebral artery
- I65.01 — Occlusion and stenosis of right vertebral artery
- I65.03 — Occlusion and stenosis of bilateral vertebral arteries
- I65.09 — Occlusion and stenosis of unspecified vertebral artery
- I65.1 — Occlusion and stenosis of basilar artery
- I65.2 — Occlusion and stenosis of carotid artery
- I65.21 — Occlusion and stenosis of right carotid artery
- I65.22 — Occlusion and stenosis of left carotid artery
- I65.23 — Occlusion and stenosis of bilateral carotid arteries
- I65.29 — Occlusion and stenosis of unspecified carotid artery
- I65.8 — Occlusion and stenosis of other precerebral arteries
- I65.9 — Occlusion and stenosis of unspecified precerebral artery
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code I60.02
Nontraumatic subarachnoid hemorrhage from left carotid siphon and bifurcation
ICD Code I69.02
Speech and language deficits following nontraumatic subarachnoid hemorrhage