ICD-10-CM › I00-I99 › I60-I69 › I66.0 Occlusion and stenosis of middle... › I66.01
Occlusion and stenosis of right middle cerebral artery
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2007 Added to the draft code set draft Occlusion and stenosis of right middle cerebral artery
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from I66 Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
Excludes1 - never coded here
- Occlusion and stenosis of cerebral artery causing cerebral infarction (I63.3-I63.5)
Includes
- embolism of cerebral artery
- narrowing of cerebral artery
- obstruction (complete) (partial) of cerebral artery
- thrombosis of cerebral artery
Inherited from the I60-I69 section Cerebrovascular diseases (I60-I69)
Excludes1 - never coded here
- 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)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Angiospasm
- Arteriolith
- Clot > brain
- Atheromatosis
- Angiosclerosis
- Arteriofibrosis
- Atherosclerosis
- Embolism > brain
- Arteriolosclerosis
- Arteritis > senile
- Hardening > artery
- Vasospasm > retina
- Embolism > cerebral
- Arteriolar sclerosis
- Hollenhorst's plaque
- Stroke > cryptogenic
- Arteritis > deformans
- Body, bodies > cytoid
- Embolism > ophthalmic
- Endarteritis > senile
- Ossification > artery
- Arteritis > obliterans
- Atheroma, atheromatous
- Calcification > artery
- Plaque > Hollenhorst's
- Embolism > intracranial
- Microembolism > retinal
- Endarteritis > deformans
- Change > arteriosclerotic
- Damage > arteriosclerotic
- Endarteritis > obliterans
- Plaque > artery, arterial
- Disease, diseased > artery
- Embolism > retina, retinal
- Embolism > artery > retinal
- Embolism > vessels of brain
- Infarct, infarction > brain
- Embolism > artery > cerebral
- Sclerosis, sclerotic > senile
- Embolism > artery > ophthalmic
Showing 40 of 89 index phrases.
Codes in the same group
| Code | Description | Status |
|---|---|---|
| I66.02 | Occlusion and stenosis of left middle cerebral artery | Valid |
| I66.03 | Occlusion and stenosis of bilateral middle cerebral arteries | Valid |
| I66.09 | Occlusion and stenosis of unspecified middle cerebral artery | Valid |