ICD-10-CM code "I66": Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction (2024)

Excludes

1. Diseases of the circulatory system (I00-I99)

   Type 2certain conditions originating in the perinatal period (P04-P96)

   Type 2certain infectious and parasitic diseases (A00-B99)

   Type 2complications of pregnancy, childbirth and the puerperium (O00-O9A)

   Type 2congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)

   Type 2endocrine, nutritional and metabolic diseases (E00-E88)

   Type 2injury, poisoning and certain other consequences of external causes (S00-T88)

   Type 2neoplasms (C00-D49)

   Type 2symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

   Type 2systemic connective tissue disorders (M30-M36)

   Type 2transient cerebral ischemic attacks and related syndromes (G45.-)

2. Cerebrovascular diseases (I60-I69)

   Type 1traumatic intracranial hemorrhage (S06.-)

3. Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction (I66)

   Type 1Occlusion and stenosis of cerebral artery causing cerebral infarction (I63.3-I63.5)

Includes

1. Diseases of the circulatory system (I00-I99)
2. Cerebrovascular diseases (I60-I69)
3. Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction (I66)

   Includesembolism of cerebral artery

   Includesnarrowing of cerebral artery

   Includesobstruction (complete) (partial) of cerebral artery

   Includesthrombosis of cerebral artery

Subcategories

• Occlusion and stenosis of middle cerebral artery (I66.0)
• Occlusion and stenosis of anterior cerebral artery (I66.1)
• Occlusion and stenosis of posterior cerebral artery (I66.2)
• Occlusion and stenosis of cerebellar arteries (I66.3)
• Occlusion and stenosis of other cerebral arteries (I66.8)
• Occlusion and stenosis of unspecified cerebral artery (I66.9)