I66.2 Occlusion and stenosis of posterior cerebral artery

Non-billable header with 4 child codes.

Applies from I66 Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction

Includes

• embolism of cerebral artery
• narrowing of cerebral artery
• obstruction (complete) (partial) of cerebral artery
• thrombosis of cerebral artery

Excludes1 (never code together)

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

Codes under I66.2

• I66.21 Occlusion and stenosis of right posterior cerebral artery
• I66.22 Occlusion and stenosis of left posterior cerebral artery
• I66.23 Occlusion and stenosis of bilateral posterior cerebral arteries
• I66.29 Occlusion and stenosis of unspecified posterior cerebral artery

Code annotations containing back-references to I66.2

Back-references to I66

• Type 1 Excludes: G31.84 Mild cognitive impairment of uncertain or unknown etiology ("cerebrovascular diseases (I60-I69)")
• Code First: G46 Vascular syndromes of brain in cerebrovascular diseases ("underlying cerebrovascular disease (I60-I69)")
• Type 2 Excludes: I10 Essential (primary) hypertension ("essential (primary) hypertension involving vessels of brain (I60-I69)")
• Type 2 Excludes: I15 Secondary hypertension ("secondary hypertension involving vessels of brain (I60-I69)")
• Type 2 Excludes: I74 Arterial embolism and thrombosis ("cerebral embolism and thrombosis (I63.3-I63.5, I66.-)")

Diagnosis Index entries for I66.2

• Occlusion, occluded › artery › cerebral › posterior

Nearby codes

• I66.1 Occlusion and stenosis of anterior cerebral artery
• I66.11 Occlusion and stenosis of right anterior cerebral artery
• I66.12 Occlusion and stenosis of left anterior cerebral artery
• I66.13 Occlusion and stenosis of bilateral anterior cerebral arteries
• I66.19 Occlusion and stenosis of unspecified anterior cerebral artery
• I66.2 Occlusion and stenosis of posterior cerebral artery (this code)
• I66.21 Occlusion and stenosis of right posterior cerebral artery
• I66.22 Occlusion and stenosis of left posterior cerebral artery
• I66.23 Occlusion and stenosis of bilateral posterior cerebral arteries
• I66.29 Occlusion and stenosis of unspecified posterior cerebral artery
• I66.3 Occlusion and stenosis of cerebellar arteries