ICD-10-CM › I00-I99 › I60-I69 › I66 Occlusion and stenosis of cerebral... › I66.2

I66.2

Occlusion and stenosis of posterior cerebral artery

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 4 more specific codes instead:

  • 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

What has happened to this code

Every change the publisher made, from 2012 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.

  1. FY2012 Added to the draft code set draft Occlusion and stenosis of posterior 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.

Showing 40 of 89 index phrases.

Codes in the same group

CodeDescriptionStatus
I66.0 Occlusion and stenosis of middle cerebral artery Not billable
I66.1 Occlusion and stenosis of anterior cerebral artery Not billable
I66.3 Occlusion and stenosis of cerebellar arteries Valid
I66.8 Occlusion and stenosis of other cerebral arteries Valid
I66.9 Occlusion and stenosis of unspecified cerebral artery Valid