I66.9 Occlusion and stenosis of unspecified cerebral artery
Instructional Notes:
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I66.9
Description: Occlusion and stenosis of unspecified cerebral artery
↓
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I66
Description: Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
Exclude1:
- Occlusion and stenosis of cerebral artery causing cerebral infarction (I63.3-I63.5)
Include:
- embolism of cerebral artery
- narrowing of cerebral artery
- obstruction (complete) (partial) of cerebral artery
- thrombosis of cerebral artery
↓
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I60-I69
Description: Cerebrovascular diseases (I60-I69)
Exclude1:
- 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)
↓
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I00-I99
Description: Diseases of the circulatory system
Exclude2:
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- transient cerebral ischemic attacks and related syndromes (G45.-)