I66.21
BillableOcclusion and stenosis of right posterior cerebral artery
Occlusion and stenosis of right posterior cerebral artery
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
Related Codes(3)
Also Known As / Clinical Terms(24)
SNOMED CT
- Embolus of circle of Willis297138001
- Embolus of right posterior cerebral artery734963004
- Occlusion of right posterior cerebral artery by embolus762651004
- Right posterior cerebral artery thrombosis1156017002
- Thrombosis of right posterior cerebral artery1156017002
- Embolism of posterior cerebral artery429821000124103
- Posterior cerebral artery embolism429821000124103
- Occlusion of right posterior cerebral artery329561000119101
- Occlusion of right posterior cerebral artery by thrombus941811000124107
- Occlusive thrombus of right posterior cerebral artery941811000124107
- Thrombosis of posterior cerebral artery5581000124100
UMLS
Clinical Terms
- Occlusive thrombus of right posterior cerebral artery
- Occlusion of right posterior cerebral artery by embolus
- Occlusion of right posterior cerebral artery
- Thrombosis of posterior cerebral artery
- Thrombosis of right posterior cerebral artery
- Posterior cerebral artery embolism
- Embolism of posterior cerebral artery
- Occlusion of right posterior cerebral artery by thrombus
- Right posterior cerebral artery thrombosis
- Embolus of circle of Willis
- Embolus of right posterior cerebral artery
Frequently Asked Questions
What is the ICD-10 code for occlusion and stenosis of right posterior cerebral artery?
The ICD-10-CM code for occlusion and stenosis of right posterior cerebral artery is I66.21. The full clinical description is "Occlusion and stenosis of right posterior cerebral artery". I66.21 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code I66.21 mean?
ICD-10-CM code I66.21 represents “Occlusion and stenosis of right posterior cerebral artery”. 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 I66.21 a billable code?
Yes, I66.21 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is I66.21 in?
I66.21 is in Chapter 9: Diseases of the Circulatory System (codes I00-I99).
What codes cannot be used with I66.21?
I66.21 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 I66.21?
Yes, when using I66.21, 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 I66.21 map to?
I66.21 maps to 8 SNOMED CT concepts: 429821000124103, 297138001, 734963004, 329561000119101, 762651004, and 3 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for I66.21?
I66.21 is linked to 1 UMLS Concept Unique Identifier: C2882434. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does I66.21 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like occlusion and stenosis of right posterior 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 I66.21?
There is no direct ICD-11 mapping available for I66.21 in the WHO crosswalk tables. This may mean the concept is classified differently in ICD-11. Use the ICD-10 to ICD-11 converter to search for related codes.
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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.