I66.0
Non-billableOcclusion and stenosis of middle cerebral artery
Occlusion and stenosis of middle cerebral artery
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
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
Child Codes (4)
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(3)
Frequently Asked Questions
What is the ICD-10 code for occlusion and stenosis of middle cerebral artery?
The ICD-10-CM code for occlusion and stenosis of middle cerebral artery is I66.0. The full clinical description is "Occlusion and stenosis of middle cerebral artery". I66.0 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code I66.0 mean?
ICD-10-CM code I66.0 represents “Occlusion and stenosis of middle cerebral artery”. It is classified under Chapter 9: Diseases of the Circulatory System and is a non-billable header code. Use a more specific child code for billing purposes.
Is I66.0 a billable code?
No, I66.0 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 4 child codes under I66.0.
What chapter is I66.0 in?
I66.0 is in Chapter 9: Diseases of the Circulatory System (codes I00-I99).
What codes cannot be used with I66.0?
I66.0 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).
What are the subcategories under I66.0?
I66.0 has 4 child codes, including: I66.01 (Occlusion and stenosis of right middle cerebral artery), I66.02 (Occlusion and stenosis of left middle cerebral artery), I66.03 (Occlusion and stenosis of bilateral middle cerebral arteries), I66.09 (Occlusion and stenosis of unspecified middle cerebral artery).
Are additional codes required with I66.0?
Yes, when using I66.0, 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 are the UMLS CUIs for I66.0?
I66.0 is linked to 1 UMLS Concept Unique Identifier: C0348833. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does I66.0 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like occlusion and stenosis of middle cerebral artery 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 I66.0?
I66.0 maps to the ICD-11 code: BD55&XA2JH8.
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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.