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ICD-10-CM Current in FY 2027

I66.19

Occlusion and stenosis of unspecified anterior cerebral artery

Release
FY 2027
Effective
Official source (opens in a new tab)

Hierarchy

Where I66.19 sits in the official hierarchy. Each level is the code it is classified under.

  1. I66 Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
  2. I66.1 Parent Occlusion and stenosis of anterior cerebral artery
  3. I66.19 This code Occlusion and stenosis of unspecified anterior cerebral artery

Official Coding Notes

Reproduced verbatim from the FY 2027 ICD-10-CM files. Notes labelled as inherited are declared on a parent code and apply here too.

Includes

embolism of cerebral artery

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

Includes

narrowing of cerebral artery

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

Includes

obstruction (complete) (partial) of cerebral artery

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

Includes

thrombosis of cerebral artery

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

Excludes1

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

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

Version History

How I66.19 appears in each release imported from the official files, newest first.

  1. FY 2027 Effective

    Current

    Occlusion and stenosis of unspecified anterior cerebral artery

  2. FY 2026 Effective

    Unchanged

    Occlusion and stenosis of unspecified anterior cerebral artery

Related Codes

Other codes under I66.1

Data Source

Code information on this page is derived from the FY 2027 ICD-10-CM files published by CDC NCHS and CMS.

Release
FY 2027
Effective
Source file
icd10cm-code-descriptions-2027.zip

Official ICD-10-CM source files (opens in a new tab)

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