I66.8
BillableOcclusion and stenosis of other cerebral arteries
Occlusion and stenosis of other cerebral arteries
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Occlusion and stenosis of perforating arteries
Includes
Conditions included under this code
- embolism of cerebral artery
- narrowing of cerebral artery
- obstruction (complete) (partial) of cerebral artery
- thrombosis of cerebral artery
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •systemic connective tissue disordersM30-M36
- •transient cerebral ischemic attacks and related syndromesG45
Use Additional Code
Additional codes that should follow this code
Related Codes(5)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(16)
SNOMED CT
UMLS
Clinical Terms
- Thrombosis of posterior communicating artery
- Ophthalmic artery occlusion
- Cerebral ischemic stroke due to small artery occlusion
- Occlusion and stenosis of perforating arteries
- Cerebral ischaemic stroke due to small artery occlusion
- Embolus of circle of Willis
- Occlusion of ophthalmic artery
Frequently Asked Questions
What is the ICD-10 code for occlusion and stenosis of other cerebral arteries?
The ICD-10-CM code for occlusion and stenosis of other cerebral arteries is I66.8. The full clinical description is "Occlusion and stenosis of other cerebral arteries". I66.8 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code I66.8 mean?
ICD-10-CM code I66.8 represents “Occlusion and stenosis of other cerebral arteries”. It is classified under Chapter 9: Diseases of the Circulatory System and is a billable/specific code that can be used on a claim.
Is I66.8 a billable code?
Yes, I66.8 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is I66.8 in?
I66.8 is in Chapter 9: Diseases of the Circulatory System (codes I00-I99).
What codes cannot be used with I66.8?
I66.8 has Excludes1 notes indicating codes that cannot be used together with it, including: traumatic intracranial hemorrhage (S06.-); Occlusion and stenosis of cerebral artery causing cerebral infarction (I63.3-I63.5).
Are additional codes required with I66.8?
Yes, when using I66.8, also report: 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).
What SNOMED CT codes does I66.8 map to?
I66.8 maps to 4 SNOMED CT concepts: 724424009, 297138001, 1231188007, 425932008. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for I66.8?
I66.8 is linked to 2 UMLS Concept Unique Identifiers: C0348638, C2882438. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does I66.8 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like occlusion and stenosis of other cerebral arteries affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of I66.8?
I66.8 maps to the ICD-11 code: 8B2Z (Cerebrovascular diseases, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.