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ICD-10-CM Current in FY 2027

I65.1

Occlusion and stenosis of basilar artery

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

Hierarchy

Where I65.1 sits in the official hierarchy. Each level is the code it is classified under.

  1. I65 Parent Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction
  2. I65.1 This code Occlusion and stenosis of basilar 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 precerebral artery

Inherited from I65 — Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

Includes

narrowing of precerebral artery

Inherited from I65 — Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

Includes

obstruction (complete) (partial) of precerebral artery

Inherited from I65 — Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

Includes

thrombosis of precerebral artery

Inherited from I65 — Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

Excludes1

insufficiency, NOS, of precerebral artery ( G45 .-)

Inherited from I65 — Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

Excludes1

insufficiency of precerebral arteries causing cerebral infarction (I63.0-I63.2)

Inherited from I65 — Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

Version History

How I65.1 appears in each release imported from the official files, newest first.

  1. FY 2027 Effective

    Current

    Occlusion and stenosis of basilar artery

  2. FY 2026 Effective

    Unchanged

    Occlusion and stenosis of basilar artery

Related Codes

Other codes under I65

Codes whose official notes reference I65.1

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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